-y-7=-8y+13+9y

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Solution for -y-7=-8y+13+9y equation: 



-y-7=-8y+13+9y

We move all terms to the left:

-y-7-(-8y+13+9y)=0

We add all the numbers together, and all the variables

-y-(y+13)-7=0

We add all the numbers together, and all the variables

-1y-(y+13)-7=0

We get rid of parentheses

-1y-y-13-7=0

We add all the numbers together, and all the variables

-2y-20=0

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

-2y=20

y=20/-2

y=-10

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