-91=3y+6y-1

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Solution for -91=3y+6y-1 equation: 



-91=3y+6y-1

We move all terms to the left:

-91-(3y+6y-1)=0

We add all the numbers together, and all the variables

-(9y-1)-91=0

We get rid of parentheses

-9y+1-91=0

We add all the numbers together, and all the variables

-9y-90=0

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

-9y=90

y=90/-9

y=-10

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