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=4+3A
We move all terms to the left:
-(4+3A)=0
We add all the numbers together, and all the variables
-(3A+4)=0
We get rid of parentheses
-3A-4=0
We move all terms containing A to the left, all other terms to the right
-3A=4
A=4/-3
A=-1+1/3
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