84=2(2+5a)

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Solution for 84=2(2+5a) equation:


84=2(2+5a)

We simplify the equation to the form, which is simple to understand 
84=2(2+5a)

Reorder the terms in parentheses
84=+(+4+10a)

Remove unnecessary parentheses
+84=+4+10a

We move all terms containing a to the left and all other terms to the right. 
-10a=+4-84

We simplify left and right side of the equation. 
-10a=-80

We divide both sides of the equation by -010 to get a. 
a=8

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