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31=-4+5y
We move all terms to the left:
31-(-4+5y)=0
We add all the numbers together, and all the variables
-(5y-4)+31=0
We get rid of parentheses
-5y+4+31=0
We add all the numbers together, and all the variables
-5y+35=0
We move all terms containing y to the left, all other terms to the right
-5y=-35
y=-35/-5
y=+7
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