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=3/A-7
We move all terms to the left:
-(3/A-7)=0
Domain of the equation: A-7)!=0We get rid of parentheses
A∈R
-3/A+7=0
We multiply all the terms by the denominator
7*A-3=0
We add all the numbers together, and all the variables
7A-3=0
We move all terms containing A to the left, all other terms to the right
7A=3
A=3/7
A=3/7
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