Toán 6 Bài tập tìm x, chuyển vế đổi dấu

We have the following rule for changing signs: if A minus B equals C then what is A Is it correct that C plus B that is I imagine that I move B here and change the sign back the minus sign changes to a plus sign here therefore it is Now this whole thing minus 115 equals 0 This mark will be 115 so I'm moving 115 here so do we do it ey are tired Now 47 by 115 I transferred to room 47 and it became X I will convert 47 here into adding 47 okay When you add 47 7 plus 5 is 12 Write 2 as 1 4 plus 1 is 5 remember 1 is 6 then 162 is correct 162 Each of these marks is considered as a number okay considered as 315 plus some number A with 401 then we will have it 146 characters I consider this as a number you 315 I moved to this side becomes 401 words 15 correct 401 words 15 is equal to how many excluding this 315 This has 6 right This has 0 right That's all right Where to This is 315 this is 6 this is 8 consists of 86 86 guess here is the model it is A cross x equal to B then what is x x is A cross B right Then this will be equal to 100 equals 146 characters 86 and what is it 86 here is it 0 6 60 right x equals 60 In this calculation I have to do the 36 ones first 36 ones is 2 right So we have that x plus 2 equals 12 then x equals 14 s When people open and close the turn we just consider it as a number okay For example suppose we have a number A and we divide it by 18 Is it 12 Its structure is A divided by B equals C then what is A Is it B multiplied by C I am person B Then we will get x equals 36 which will be 18 now multiply by 12 Eighteen to twelve okay s 96 12 what is that is Is 216 correct 216 Find x by solving the equation Now I will move 36 to this side as a positive number Change the sign back Change the negative sign to a positive number Add 36 like this Here is 2 ere 5 here 2 so 252 252 Just like that consider this whole group as a number it's like 70 how many words does 70 equal to 45 's very simple then this has to be done actually I just type 70 characters and 45 comes out as 25 en we will get 5 multiplied by x times 3 will be 25 Multiply 3 by 3 then divide by 5 that's 3 divided by 5 like this resulting in 5 right 3 times 5 equals 15 en we get x equals 8 Here is this structure a to the power m divided by a to the power n is equal to a to the power of m minus n similarly as such Here it's 4 to the power of 5 divided by 4 to the power of 3 so I just need to take 5 minus 3 which is 4 squared right four squared equals 16 therefore it follows 10 plus 2x equals 4 squared is 16 so 2x will be 6 is x equal to 3 right We get x equal to 3 This is 16 this x equals 3 This is 2 to the power of 3 multiplied by 2 to the power of 2 It equals 2 to the power of 5 What is 2 to the power of 5 2 to the power of 5 is 32 so we get tha 2 times equals 138 equals 32 then it follows that 2x equals Now I transfer 138 here becomes 138 plus 32 32 is 0 if 1 7 1 170 2 times 170 Then X will be 170 divided by 2 which is 85 got it en 123 minus this group by 38 okay then this group will be 123 minus 38 What is 123 minus 38 3 minus 8 here is 5 Remember 1 o eight here is that right That makes 85 We deduce that 5 multiplied by x plus 4 by 85 x plus 4 equals x plus 4 will be 85 divided by 5 is 17 and leads to x equals 13 right Here here we have an operation where we take the 7 cubed and divide it down here into 7 cubed like this Then I will have it 3 times 2 to the power of 4 is actually 16 right equals I'll take 7 to the power of 3 and divide it here that is 7 to the power of 4 divided by 7 to the power of 3 is equal to 7 to the power of 1 I subtract 3 from 4 That is equal to 7 So now when we divide 7 cubed down here it's actually just 7 left and multiply by 2 here to get 14 respectively 14 therefore I moved 16 here right 14 times 16 is about 30 then I divide x down 30 divided by 3 equals 10 so x equals 10 Multiply this entire group by 28 using this method then this group will equal this 5 divided by 28 please Divide by 28 like this 5 6 divided by 28 is 2 bring this down when you bring down 2 you get 0 and 28 divided into 1 this becomes 201 okay so we get is 6 times 72 divided by 2 minus 84 equals 201 en now I moved to number 84 here okay plus sig This is 84 5 8 2 becomes 285 okay e resultis285 [-] [-] Then 285 divided by 2 is 285 so when I move the 2 here it becomes the multiplier multiply by 2 subtract 72 from 6 times It will be 2 I take this 2 and move it here then multiply This is the division moved to the city of 2 What is 285 multiplied by 2 5 times2is 10 carry 1 0 2 times 8is 16 carry 1 17 carry 1 2times2 is 4 Remember 1 is 5 is that right therefore x equals here you go I moved 72 here city plus that means I have 570 plus 72 this 2 this 4 remember 1 becomes 6 here then you divide by 6 right becomes 1 this This unit is equal to 107 This is division Dividing A by B gives C Now A will be equal to B multiplied by C That means now we take this 2 cubed Click here then this means I can infer that 2 to the power of x equals I know that 2 to the power of 4 equals 16 so we divide down here then x equals 2 to the power of 4 Multiply by 2 cubed It follows that 2 to the power of x equals 2 to the power of 7 so it follows that x equals 7 243 do you know how much 243 is 243 divided by 3 is 81 dividedby3is 27 divided by 3 again is 9 divided by 3 aga [-] [-] en there are 3 divided by 3 hereis done12345 so 243 is 3 to the power of 5 [-] This is 3 to the power of 5 Therefore 3 to the power of x s is the place where I multiply by 3 equals 3 to the power of 5 So x plus 3 equals 5 so we get x equals 2 x equals 2 s one is 125 so I know this one is 5 cubed so it follows that this is A cubed and equals If B is 3 then I deduce that A equals B Therefore in this case I will infer tha 3 minus 1 will be 5 From that x is obtained I moved 1 correctly right It becomes 6 Divided by 3 is 2 So x equals 2 Do you know that 9 is 7 squared 7 squared here A squared equals B squared so it follows that A equals B so we get 3 x minus 2 equals 7 3times Therefore x is 3 2 to the power of x multiplied by 3 to the power of x this according to this method 2 to the power of m multiplied by A to the power of m multiplied by B to the power of m equals A multiplied by B that is If the exponents are the same we just need to multiply these two numbers together which in this case is 2 multiplied by 3 all x to the power of 6 and that is equal to 6 to the power of x So this part I can infer tha 6 multiplied by x equals 36 36 is 6 squared So we will get x equals 2 Here we have 2 to the power of x which goes down plus 2 to the power of x plus 1 which becomes here 2 to the power of x plus 1 2 to the power of x multiplied by 2 to the power of 1 and 2 to the power of x equals 2 right then we will have and 2 multiplied by 2 to the power of x equals 12 Yesterday Teacher Hay Chiu did this this is one orange plus two oranges that equals three oranges right s means that this place is 3 multiplied by 2 to the power of x equals 12 en it follows that number 3 is correct then I move number 3 down here 3 divided by 12 divided by 3 equals 4 so this place is 2 to the power of x equals 4 but just 2 to the power of x equals 4 4 is 2 squared therefore x equals 2 and we get x equals 2 Similarly so Question 16 and question 17 are the same What is 3 to the power of x plus 1 3 to the power of x plus 1 is equal to 3 to the power of x multiplied by 3 to the power of 1 which is 3 multiplied by 3 to the power of x right and what about the res 3 to the power of x plus 2 is what is 3 to the power of x multiplied by 3 to the power of 2 3 to the power of 2 is 9 that is equal to 9 Multiply by 3 to the power of x so I will get this which is 3 to the power of x plus 3 times 3 to the power of x plus 9 times 3 to the power of x by 3 9 s is like 1 multiplied by 3 to the power of x I call this 1 orange 3 oranges add 9 add 9 is that right 1 add 3is 13 so it follows 3 to the power of x equals 13 multiplied by 3 to the power of x equals 39 now if we divide 13 down then 39 divided by 13 is equal to 3 cubed equal to 3 so we have 3 to the power of x equal to 3 okay Then x is 1 if not 1 so I get x equals 1 Thatjust finishedtreating case number 31 which is region17Y