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12a-13=3
We simplify the equation to the form, which is simple to understand
12a-13=3
We move all terms containing a to the left and all other terms to the right.
+12a=+3+13
We simplify left and right side of the equation.
+12a=+16
We divide both sides of the equation by 12 to get a.
a=1.33333333333
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