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3a/8-5=12
We move all terms to the left:
3a/8-5-(12)=0
We add all the numbers together, and all the variables
3a/8-17=0
We multiply all the terms by the denominator
3a-17*8=0
We add all the numbers together, and all the variables
3a-136=0
We move all terms containing a to the left, all other terms to the right
3a=136
a=136/3
a=45+1/3
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