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a/5=4/2
We move all terms to the left:
a/5-(4/2)=0
We add all the numbers together, and all the variables
a/5-2=0
We multiply all the terms by the denominator
a-2*5=0
We add all the numbers together, and all the variables
a-10=0
We move all terms containing a to the left, all other terms to the right
a=10
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