-3=3x-2(4x-21)

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Solution for -3=3x-2(4x-21) equation: 



-3=3x-2(4x-21)

We move all terms to the left:

-3-(3x-2(4x-21))=0



We calculate terms in parentheses: -(3x-2(4x-21)), so:

3x-2(4x-21)

We multiply parentheses

3x-8x+42

We add all the numbers together, and all the variables

-5x+42

Back to the equation:

-(-5x+42)



We get rid of parentheses

5x-42-3=0

We add all the numbers together, and all the variables

5x-45=0

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

5x=45

x=45/5

x=9

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