9x-(2x+2)=9x-42

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Solution for 9x-(2x+2)=9x-42 equation: 



9x-(2x+2)=9x-42

We move all terms to the left:

9x-(2x+2)-(9x-42)=0

We get rid of parentheses

9x-2x-9x-2+42=0

We add all the numbers together, and all the variables

-2x+40=0

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

-2x=-40

x=-40/-2

x=+20

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