0.75(12+4a)=21

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Solution for 0.75(12+4a)=21 equation:


0.75(12+4a)=21

We simplify the equation to the form, which is simple to understand 
0.75(12+4a)=21

Reorder the terms in parentheses
+(+9+3a)=21

Remove unnecessary parentheses
+9+3a=+21

We move all terms containing a to the left and all other terms to the right. 
+3a=+21-9

We simplify left and right side of the equation. 
+3a=+12

We divide both sides of the equation by 3 to get a. 
a=4

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