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142=y-0.2y
We move all terms to the left:
142-(y-0.2y)=0
We add all the numbers together, and all the variables
-(+0.8y)+142=0
We get rid of parentheses
-0.8y+142=0
We move all terms containing y to the left, all other terms to the right
-0.8y=-142
y=-142/-0.8
y=177+0.40000000000001/0.8
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