-9y+8y=7-13

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Solution for -9y+8y=7-13 equation: 



-9y+8y=7-13

We move all terms to the left:

-9y+8y-(7-13)=0

We add all the numbers together, and all the variables

-9y+8y-(-6)=0

We add all the numbers together, and all the variables

-1y+6=0

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

-y=-6

y=-6/-1

y=+6

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