2(2x+21)=7x-39

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Solution for 2(2x+21)=7x-39 equation: 



2(2x+21)=7x-39

We move all terms to the left:

2(2x+21)-(7x-39)=0

We multiply parentheses

4x-(7x-39)+42=0

We get rid of parentheses

4x-7x+39+42=0

We add all the numbers together, and all the variables

-3x+81=0

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

-3x=-81

x=-81/-3

x=+27

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