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a=10a-20
We simplify the equation to the form, which is simple to understand
a=10a-20
We move all terms containing a to the left and all other terms to the right.
+1a-10a=-20
We simplify left and right side of the equation.
-9a=-20
We divide both sides of the equation by -9 to get a.
a=2.2222222222222
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