-12x+21=-3(3x-5)

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Solution for -12x+21=-3(3x-5) equation: 



-12x+21=-3(3x-5)

We move all terms to the left:

-12x+21-(-3(3x-5))=0



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

-3(3x-5)

We multiply parentheses

-9x+15

Back to the equation:

-(-9x+15)



We get rid of parentheses

-12x+9x-15+21=0

We add all the numbers together, and all the variables

-3x+6=0

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

-3x=-6

x=-6/-3

x=+2

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