9-12=3n

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Solution for 9-12=3n equation:


9-12=3n

We simplify the equation to the form, which is simple to understand 
9-12=3n

We move all terms containing n to the left and all other terms to the right. 
-3n=-9+12

We simplify left and right side of the equation. 
-3n=+3

We divide both sides of the equation by -03 to get n. 
n=-1

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