-42=-2(x+12)-(x+15)

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Solution for -42=-2(x+12)-(x+15) equation: 



-42=-2(x+12)-(x+15)

We move all terms to the left:

-42-(-2(x+12)-(x+15))=0



We calculate terms in parentheses: -(-2(x+12)-(x+15)), so:

-2(x+12)-(x+15)

We multiply parentheses

-2x-(x+15)-24

We get rid of parentheses

-2x-x-15-24

We add all the numbers together, and all the variables

-3x-39

Back to the equation:

-(-3x-39)



We get rid of parentheses

3x+39-42=0

We add all the numbers together, and all the variables

3x-3=0

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

3x=3

x=3/3

x=1

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