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t/2-13=-9
We move all terms to the left:
t/2-13-(-9)=0
We add all the numbers together, and all the variables
t/2-4=0
We multiply all the terms by the denominator
t-4*2=0
We add all the numbers together, and all the variables
t-8=0
We move all terms containing t to the left, all other terms to the right
t=8
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