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40=6y-30
We move all terms to the left:
40-(6y-30)=0
We get rid of parentheses
-6y+30+40=0
We add all the numbers together, and all the variables
-6y+70=0
We move all terms containing y to the left, all other terms to the right
-6y=-70
y=-70/-6
y=11+2/3
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