90=15a

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Solution for 90=15a equation:


90=15a

We simplify the equation to the form, which is simple to understand 
90=15a

We move all terms containing a to the left and all other terms to the right. 
-15a=-90

We simplify left and right side of the equation. 
-15a=-90

We divide both sides of the equation by -015 to get a. 
a=6

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