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a+37=2a-1
We move all terms to the left:
a+37-(2a-1)=0
We get rid of parentheses
a-2a+1+37=0
We add all the numbers together, and all the variables
-1a+38=0
We move all terms containing a to the left, all other terms to the right
-a=-38
a=-38/-1
a=+38
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