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2(2a-1)=-(a+1)
We move all terms to the left:
2(2a-1)-(-(a+1))=0
We multiply parentheses
4a-(-(a+1))-2=0
We calculate terms in parentheses: -(-(a+1)), so:We get rid of parentheses
-(a+1)
We get rid of parentheses
-a-1
We add all the numbers together, and all the variables
-1a-1
Back to the equation:
-(-1a-1)
4a+1a+1-2=0
We add all the numbers together, and all the variables
5a-1=0
We move all terms containing a to the left, all other terms to the right
5a=1
a=1/5
a=1/5
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