(y-5)-(y+7)=9y

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Solution for (y-5)-(y+7)=9y equation: 



(y-5)-(y+7)=9y

We move all terms to the left:

(y-5)-(y+7)-(9y)=0

We add all the numbers together, and all the variables

-9y+(y-5)-(y+7)=0

We get rid of parentheses

-9y+y-y-5-7=0

We add all the numbers together, and all the variables

-9y-12=0

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

-9y=12

y=12/-9

y=-1+1/3

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