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y-4=3y-80
We move all terms to the left:
y-4-(3y-80)=0
We get rid of parentheses
y-3y+80-4=0
We add all the numbers together, and all the variables
-2y+76=0
We move all terms containing y to the left, all other terms to the right
-2y=-76
y=-76/-2
y=+38
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