-30=3(12-x)

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Solution for -30=3(12-x) equation: 



-30=3(12-x)

We move all terms to the left:

-30-(3(12-x))=0

We add all the numbers together, and all the variables

-(3(-1x+12))-30=0



We calculate terms in parentheses: -(3(-1x+12)), so:

3(-1x+12)

We multiply parentheses

-3x+36

Back to the equation:

-(-3x+36)



We get rid of parentheses

3x-36-30=0

We add all the numbers together, and all the variables

3x-66=0

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

3x=66

x=66/3

x=22

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