3(-1x-7)=2(-2x+21)

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Solution for 3(-1x-7)=2(-2x+21) equation: 



3(-1x-7)=2(-2x+21)

We move all terms to the left:

3(-1x-7)-(2(-2x+21))=0

We multiply parentheses

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



We calculate terms in parentheses: -(2(-2x+21)), so:

2(-2x+21)

We multiply parentheses

-4x+42

Back to the equation:

-(-4x+42)



We get rid of parentheses

-3x+4x-42-21=0

We add all the numbers together, and all the variables

x-63=0

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

x=63

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