21=3(x-36)

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Solution for 21=3(x-36) equation: 



21=3(x-36)

We move all terms to the left:

21-(3(x-36))=0



We calculate terms in parentheses: -(3(x-36)), so:

3(x-36)

We multiply parentheses

3x-108

Back to the equation:

-(3x-108)



We get rid of parentheses

-3x+108+21=0

We add all the numbers together, and all the variables

-3x+129=0

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

-3x=-129

x=-129/-3

x=+43

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