4x-80=x+40

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Solution for 4x-80=x+40 equation: 



4x-80=x+40

We move all terms to the left:

4x-80-(x+40)=0

We get rid of parentheses

4x-x-40-80=0

We add all the numbers together, and all the variables

3x-120=0

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

3x=120

x=120/3

x=40

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