-3n+12-9n=0

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Solution for -3n+12-9n=0 equation:


-3n+12-9n=0

We simplify the equation to the form, which is simple to understand 
-3n+12-9n=0

We move all terms containing n to the left and all other terms to the right. 
-3n-9n=0-12

We simplify left and right side of the equation. 
-12n=-12

We divide both sides of the equation by -12 to get n. 
n=1

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