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4(+2)=4A+9
We move all terms to the left:
4(+2)-(4A+9)=0
We add all the numbers together, and all the variables
-(4A+9)+42=0
We get rid of parentheses
-4A-9+42=0
We add all the numbers together, and all the variables
-4A+33=0
We move all terms containing A to the left, all other terms to the right
-4A=-33
A=-33/-4
A=8+1/4
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