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4a=4a-45+2a-2
We move all terms to the left:
4a-(4a-45+2a-2)=0
We add all the numbers together, and all the variables
4a-(6a-47)=0
We get rid of parentheses
4a-6a+47=0
We add all the numbers together, and all the variables
-2a+47=0
We move all terms containing a to the left, all other terms to the right
-2a=-47
a=-47/-2
a=23+1/2
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