12-9=-3(x+10)

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Solution for 12-9=-3(x+10) equation: 



12-9=-3(x+10)

We move all terms to the left:

12-9-(-3(x+10))=0

We add all the numbers together, and all the variables

-(-3(x+10))+3=0



We calculate terms in parentheses: -(-3(x+10)), so:

-3(x+10)

We multiply parentheses

-3x-30

Back to the equation:

-(-3x-30)



We get rid of parentheses

3x+30+3=0

We add all the numbers together, and all the variables

3x+33=0

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

3x=-33

x=-33/3

x=-11

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