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5+t/9=12
We move all terms to the left:
5+t/9-(12)=0
We add all the numbers together, and all the variables
t/9-7=0
We multiply all the terms by the denominator
t-7*9=0
We add all the numbers together, and all the variables
t-63=0
We move all terms containing t to the left, all other terms to the right
t=63
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