a+a+28=90

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Solution for a+a+28=90 equation:


a+a+28=90

We simplify the equation to the form, which is simple to understand 
a+a+28=90

We move all terms containing a to the left and all other terms to the right. 
+1a+1a=+90-28

We simplify left and right side of the equation. 
+2a=+62

We divide both sides of the equation by 2 to get a. 
a=31

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