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3a-(1-a)=2a
We simplify the equation to the form, which is simple to understand
3a-(1-a)=2a
Remove unnecessary parentheses
3a-1+1a=2a
We move all terms containing a to the left and all other terms to the right.
+3a+1a-2a=+1
We simplify left and right side of the equation.
+2a=+1
We divide both sides of the equation by 2 to get a.
a=0.5
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