-10y+9y=-9

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Solution for -10y+9y=-9 equation: 



-10y+9y=-9

We move all terms to the left:

-10y+9y-(-9)=0

We add all the numbers together, and all the variables

-1y+9=0

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

-y=-9

y=-9/-1

y=+9

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