A+90-15=20

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Solution for A+90-15=20 equation:


a+90-15=20

We simplify the equation to the form, which is simple to understand 
a+90-15=20

We move all terms containing a to the left and all other terms to the right. 
+1a=+20-90+15

We simplify left and right side of the equation. 
+1a=-55

We divide both sides of the equation by 1 to get a. 
a=-55

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