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87=-3(8a-5)
We simplify the equation to the form, which is simple to understand
87=-3(8a-5)
Reorder the terms in parentheses
87=+(-24a+15)
Remove unnecessary parentheses
+87=-24a+15
We move all terms containing a to the left and all other terms to the right.
+24a=+15-87
We simplify left and right side of the equation.
+24a=-72
We divide both sides of the equation by 024 to get a.
a=-3
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