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2y=8-20-10y
We move all terms to the left:
2y-(8-20-10y)=0
We add all the numbers together, and all the variables
2y-(-10y-12)=0
We get rid of parentheses
2y+10y+12=0
We add all the numbers together, and all the variables
12y+12=0
We move all terms containing y to the left, all other terms to the right
12y=-12
y=-12/12
y=-1
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