21=5x-2(x-3)

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Solution for 21=5x-2(x-3) equation: 



21=5x-2(x-3)

We move all terms to the left:

21-(5x-2(x-3))=0



We calculate terms in parentheses: -(5x-2(x-3)), so:

5x-2(x-3)

We multiply parentheses

5x-2x+6

We add all the numbers together, and all the variables

3x+6

Back to the equation:

-(3x+6)



We get rid of parentheses

-3x-6+21=0

We add all the numbers together, and all the variables

-3x+15=0

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

-3x=-15

x=-15/-3

x=+5

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