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a+13a=12
We simplify the equation to the form, which is simple to understand
a+13a=12
We move all terms containing a to the left and all other terms to the right.
+1a+13a=+12
We simplify left and right side of the equation.
+14a=+12
We divide both sides of the equation by 14 to get a.
a=0.857142857143
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