-3y-y-(-7y)=-9

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Solution for -3y-y-(-7y)=-9 equation: 



-3y-y-(-7y)=-9

We move all terms to the left:

-3y-y-(-7y)-(-9)=0

We add all the numbers together, and all the variables

-4y-(-7y)+9=0

We get rid of parentheses

-4y+7y+9=0

We add all the numbers together, and all the variables

3y+9=0

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

3y=-9

y=-9/3

y=-3

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