-y-7=-7-9y

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Solution for -y-7=-7-9y equation: 



-y-7=-7-9y

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-1y-(-9y-7)-7=0

We get rid of parentheses

-1y+9y+7-7=0

We add all the numbers together, and all the variables

8y=0

y=0/8

y=0

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