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7y-2=-8y-31
We move all terms to the left:
7y-2-(-8y-31)=0
We get rid of parentheses
7y+8y+31-2=0
We add all the numbers together, and all the variables
15y+29=0
We move all terms containing y to the left, all other terms to the right
15y=-29
y=-29/15
y=-1+14/15
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