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t/2+15=18
We move all terms to the left:
t/2+15-(18)=0
We add all the numbers together, and all the variables
t/2-3=0
We multiply all the terms by the denominator
t-3*2=0
We add all the numbers together, and all the variables
t-6=0
We move all terms containing t to the left, all other terms to the right
t=6
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