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=-0.04Y^+2Y+4
We move all terms to the left:
-(-0.04Y^+2Y+4)=0
We get rid of parentheses
0.04Y^-2Y-4=0
We add all the numbers together, and all the variables
-1.96Y-4=0
We move all terms containing Y to the left, all other terms to the right
-1.96Y=4
Y=4/-1.96
Y=-2+0.08/1.96
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