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

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



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

We move all terms to the left:

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



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

2x-3(4x-21)

We multiply parentheses

2x-12x+63

We add all the numbers together, and all the variables

-10x+63

Back to the equation:

-(-10x+63)



We get rid of parentheses

10x-63+3=0

We add all the numbers together, and all the variables

10x-60=0

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

10x=60

x=60/10

x=6

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