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2+a=(2a-4)
We simplify the equation to the form, which is simple to understand
2+a=(2a-4)
Remove unnecessary parentheses
2+a=2a-4
We move all terms containing a to the left and all other terms to the right.
+1a-2a=-4-2
We simplify left and right side of the equation.
-1a=-6
We divide both sides of the equation by -1 to get a.
a=6
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