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a/2-9=2
We move all terms to the left:
a/2-9-(2)=0
We add all the numbers together, and all the variables
a/2-11=0
We multiply all the terms by the denominator
a-11*2=0
We add all the numbers together, and all the variables
a-22=0
We move all terms containing a to the left, all other terms to the right
a=22
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