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20-a=10a-3
We simplify the equation to the form, which is simple to understand
20-a=10a-3
We move all terms containing a to the left and all other terms to the right.
-1a-10a=-3-20
We simplify left and right side of the equation.
-11a=-23
We divide both sides of the equation by -11 to get a.
a=2.09090909091
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