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-5t-7=12.5
We move all terms to the left:
-5t-7-(12.5)=0
We add all the numbers together, and all the variables
-5t-19.5=0
We move all terms containing t to the left, all other terms to the right
-5t=19.5
t=19.5/-5
t=-3+3/3.33333333333
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