-6(x+7)=21+3x

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Solution for -6(x+7)=21+3x equation: 



-6(x+7)=21+3x

We move all terms to the left:

-6(x+7)-(21+3x)=0

We add all the numbers together, and all the variables

-6(x+7)-(3x+21)=0

We multiply parentheses

-6x-(3x+21)-42=0

We get rid of parentheses

-6x-3x-21-42=0

We add all the numbers together, and all the variables

-9x-63=0

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

-9x=63

x=63/-9

x=-7

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