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0=72-4^2+12t
We move all terms to the left:
0-(72-4^2+12t)=0
We add all the numbers together, and all the variables
-(72-4^2+12t)=0
We get rid of parentheses
-12t-72+4^2=0
We add all the numbers together, and all the variables
-12t-56=0
We move all terms containing t to the left, all other terms to the right
-12t=56
t=56/-12
t=-4+2/3
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