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5/15a+3/8=21+a
We simplify the equation to the form, which is simple to understand
5/15a+3/8=21+a
We move all terms containing a to the left and all other terms to the right.
+15a-1a=+21-0.375
We simplify left and right side of the equation.
+14a=+20.625
We divide both sides of the equation by 14 to get a.
a=1.4732142857143
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