15-a=-27

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Solution for 15-a=-27 equation:


15-a=-27

We simplify the equation to the form, which is simple to understand 
15-a=-27

We move all terms containing a to the left and all other terms to the right. 
-1a=-27-15

We simplify left and right side of the equation. 
-1a=-42

We divide both sides of the equation by -1 to get a. 
a=42

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