-3(y+1)+y=15

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



-3(y+1)+y=15

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

y-3y-3-15=0

We add all the numbers together, and all the variables

-2y-18=0

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

-2y=18

y=18/-2

y=-9

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