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4(385-4)+5a=1715
We simplify the equation to the form, which is simple to understand
4(385-4)+5a=1715
Reorder the terms in parentheses
+(+1524)+5a=1715
Remove unnecessary parentheses
+1524+5a=+1715
We move all terms containing a to the left and all other terms to the right.
+5a=+1715-1524
We simplify left and right side of the equation.
+5a=+191
We divide both sides of the equation by 5 to get a.
a=38.2
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