12x-120=4x+40

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Solution for 12x-120=4x+40 equation: 



12x-120=4x+40

We move all terms to the left:

12x-120-(4x+40)=0

We get rid of parentheses

12x-4x-40-120=0

We add all the numbers together, and all the variables

8x-160=0

We move all terms containing x to the left, all other terms to the right

8x=160

x=160/8

x=20

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