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3+a/4=2
We move all terms to the left:
3+a/4-(2)=0
We add all the numbers together, and all the variables
a/4+1=0
We multiply all the terms by the denominator
a+1*4=0
We add all the numbers together, and all the variables
a+4=0
We move all terms containing a to the left, all other terms to the right
a=-4
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