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25t-87.5=12
We move all terms to the left:
25t-87.5-(12)=0
We add all the numbers together, and all the variables
25t-99.5=0
We move all terms containing t to the left, all other terms to the right
25t=99.5
t=99.5/25
t=3+16.333333333333/16.666666666667
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