21=4x-3(x-2)

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



21=4x-3(x-2)

We move all terms to the left:

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



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

4x-3(x-2)

We multiply parentheses

4x-3x+6

We add all the numbers together, and all the variables

x+6

Back to the equation:

-(x+6)



We get rid of parentheses

-x-6+21=0

We add all the numbers together, and all the variables

-1x+15=0

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

-x=-15

x=-15/-1

x=+15

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