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2(a-1)=(a+1)
We simplify the equation to the form, which is simple to understand
2(a-1)=(a+1)
Reorder the terms in parentheses
+(+2a-2)=(a+1)
Remove unnecessary parentheses
+2a-2=+(+a+1+)
Remove unnecessary parentheses
+2a-2=a+1
We move all terms containing a to the left and all other terms to the right.
+2a-1a=+1+2
We simplify left and right side of the equation.
+1a=+3
We divide both sides of the equation by 1 to get a.
a=3
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