-80=-4x+40

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



-80=-4x+40

We move all terms to the left:

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

We get rid of parentheses

4x-40-80=0

We add all the numbers together, and all the variables

4x-120=0

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

4x=120

x=120/4

x=30

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