a/2+a/5=21

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Solution for a/2+a/5=21 equation:


a/2+a/5=21

We simplify the equation to the form, which is simple to understand 
a/2+a/5=21

We move all terms containing a to the left and all other terms to the right. 
 + 0.5a + 0.2a=+21

We simplify left and right side of the equation. 
 + 0.7a=+21

We divide both sides of the equation by 0.7 to get a. 
a=30

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