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

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



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

We move all terms to the left:

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

We multiply parentheses

-7x-(3x+21)-49=0

We get rid of parentheses

-7x-3x-21-49=0

We add all the numbers together, and all the variables

-10x-70=0

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

-10x=70

x=70/-10

x=-7

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