-3=-(y+-9)+-15

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Solution for -3=-(y+-9)+-15 equation: 



-3=-(y+-9)+-15

We move all terms to the left:

-3-(-(y+-9)+-15)=0

We add all the numbers together, and all the variables

-(-(y-9)+-15)-3=0

We use the square of the difference formula

-(-(y-9)-15)-3=0



We calculate terms in parentheses: -(-(y-9)-15), so:

-(y-9)-15

We get rid of parentheses

-y+9-15

We add all the numbers together, and all the variables

-1y-6

Back to the equation:

-(-1y-6)



We get rid of parentheses

1y+6-3=0

We add all the numbers together, and all the variables

y+3=0

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

y=-3

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