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(5A-7)=198
We move all terms to the left:
(5A-7)-(198)=0
We get rid of parentheses
5A-7-198=0
We add all the numbers together, and all the variables
5A-205=0
We move all terms containing A to the left, all other terms to the right
5A=205
A=205/5
A=41
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