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y-4(y+1)=31
We move all terms to the left:
y-4(y+1)-(31)=0
We multiply parentheses
y-4y-4-31=0
We add all the numbers together, and all the variables
-3y-35=0
We move all terms containing y to the left, all other terms to the right
-3y=35
y=35/-3
y=-11+2/3
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