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0=-16^2+15t+25
We move all terms to the left:
0-(-16^2+15t+25)=0
We add all the numbers together, and all the variables
-(-16^2+15t+25)=0
We get rid of parentheses
-15t-25+16^2=0
We add all the numbers together, and all the variables
-15t+231=0
We move all terms containing t to the left, all other terms to the right
-15t=-231
t=-231/-15
t=15+2/5
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