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7=t/4-9
We move all terms to the left:
7-(t/4-9)=0
We get rid of parentheses
-t/4+9+7=0
We multiply all the terms by the denominator
-t+9*4+7*4=0
We add all the numbers together, and all the variables
-1t+64=0
We move all terms containing t to the left, all other terms to the right
-t=-64
t=-64/-1
t=+64
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