21+5x=3(6+2x)

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Solution for 21+5x=3(6+2x) equation: 



21+5x=3(6+2x)

We move all terms to the left:

21+5x-(3(6+2x))=0

We add all the numbers together, and all the variables

5x-(3(2x+6))+21=0



We calculate terms in parentheses: -(3(2x+6)), so:

3(2x+6)

We multiply parentheses

6x+18

Back to the equation:

-(6x+18)



We get rid of parentheses

5x-6x-18+21=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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