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=-16^2+65S+4.5
We move all terms to the left:
-(-16^2+65S+4.5)=0
We get rid of parentheses
-65S-4.5+16^2=0
We add all the numbers together, and all the variables
-65S+251.5=0
We move all terms containing S to the left, all other terms to the right
-65S=-251.5
S=-251.5/-65
S=3+37.666666666667/43.333333333333
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