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y=-1+5y-20=0
We move all terms to the left:
y-(-1+5y-20)=0
We add all the numbers together, and all the variables
y-(5y-21)=0
We get rid of parentheses
y-5y+21=0
We add all the numbers together, and all the variables
-4y+21=0
We move all terms containing y to the left, all other terms to the right
-4y=-21
y=-21/-4
y=5+1/4
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