21-3(x-7)=X+2

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Solution for 21-3(x-7)=X+2 equation: 



21-3(x-7)=x+2

We move all terms to the left:

21-3(x-7)-(x+2)=0

We multiply parentheses

-3x-(x+2)+21+21=0

We get rid of parentheses

-3x-x-2+21+21=0

We add all the numbers together, and all the variables

-4x+40=0

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

-4x=-40

x=-40/-4

x=+10

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