9y+-9=-18

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Solution for 9y+-9=-18 equation: 



9y+-9=-18

We move all terms to the left:

9y+-9-(-18)=0

We add all the numbers together, and all the variables

9y+9=0

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

9y=-9

y=-9/9

y=-1

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