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a+2=4a-1
We move all terms to the left:
a+2-(4a-1)=0
We get rid of parentheses
a-4a+1+2=0
We add all the numbers together, and all the variables
-3a+3=0
We move all terms containing a to the left, all other terms to the right
-3a=-3
a=-3/-3
a=1
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