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a/13+16=20
We move all terms to the left:
a/13+16-(20)=0
We add all the numbers together, and all the variables
a/13-4=0
We multiply all the terms by the denominator
a-4*13=0
We add all the numbers together, and all the variables
a-52=0
We move all terms containing a to the left, all other terms to the right
a=52
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