9+12=-3(5x-7)

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Solution for 9+12=-3(5x-7) equation: 



9+12=-3(5x-7)

We move all terms to the left:

9+12-(-3(5x-7))=0

We add all the numbers together, and all the variables

-(-3(5x-7))+21=0



We calculate terms in parentheses: -(-3(5x-7)), so:

-3(5x-7)

We multiply parentheses

-15x+21

Back to the equation:

-(-15x+21)



We get rid of parentheses

15x-21+21=0

We add all the numbers together, and all the variables

15x=0

x=0/15

x=0

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