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=0.2Y^-2
We move all terms to the left:
-(0.2Y^-2)=0
We get rid of parentheses
-0.2Y^+2=0
We add all the numbers together, and all the variables
-0.2Y+2=0
We move all terms containing Y to the left, all other terms to the right
-0.2Y=-2
Y=-2/-0.2
Y=+10
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