-1=7y-y-9+3y

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Solution for -1=7y-y-9+3y equation: 



-1=7y-y-9+3y

We move all terms to the left:

-1-(7y-y-9+3y)=0

We add all the numbers together, and all the variables

-(9y-9)-1=0

We get rid of parentheses

-9y+9-1=0

We add all the numbers together, and all the variables

-9y+8=0

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

-9y=-8

y=-8/-9

y=8/9

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