-3(-x+7)=5x=-21

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Solution for -3(-x+7)=5x=-21 equation: 



-3(-x+7)=5x=-21

We move all terms to the left:

-3(-x+7)-(5x)=0

We add all the numbers together, and all the variables

-3(-1x+7)-5x=0

We add all the numbers together, and all the variables

-5x-3(-1x+7)=0

We multiply parentheses

-5x+3x-21=0

We add all the numbers together, and all the variables

-2x-21=0

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

-2x=21

x=21/-2

x=-10+1/2

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