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50=8y-30
We move all terms to the left:
50-(8y-30)=0
We get rid of parentheses
-8y+30+50=0
We add all the numbers together, and all the variables
-8y+80=0
We move all terms containing y to the left, all other terms to the right
-8y=-80
y=-80/-8
y=+10
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