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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(7(-2x+3)), so:

7(-2x+3)

We multiply parentheses

-14x+21

Back to the equation:

-(-14x+21)



We get rid of parentheses

14x-21-21=0

We add all the numbers together, and all the variables

14x-42=0

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

14x=42

x=42/14

x=3

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