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-y/7+9=-9
We move all terms to the left:
-y/7+9-(-9)=0
We add all the numbers together, and all the variables
-y/7+18=0
We multiply all the terms by the denominator
-y+18*7=0
We add all the numbers together, and all the variables
-1y+126=0
We move all terms containing y to the left, all other terms to the right
-y=-126
y=-126/-1
y=+126
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