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t=-16^2+80t+5
We move all terms to the left:
t-(-16^2+80t+5)=0
We get rid of parentheses
t-80t-5+16^2=0
We add all the numbers together, and all the variables
-79t+251=0
We move all terms containing t to the left, all other terms to the right
-79t=-251
t=-251/-79
t=3+14/79
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