x+15=-3(1-x)

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Solution for x+15=-3(1-x) equation: 



x+15=-3(1-x)

We move all terms to the left:

x+15-(-3(1-x))=0

We add all the numbers together, and all the variables

x-(-3(-1x+1))+15=0



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

-3(-1x+1)

We multiply parentheses

3x-3

Back to the equation:

-(3x-3)



We get rid of parentheses

x-3x+3+15=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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