3+2n+n=12

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Solution for 3+2n+n=12 equation:


3+2n+n=12

We simplify the equation to the form, which is simple to understand 
3+2n+n=12

We move all terms containing n to the left and all other terms to the right. 
+2n+1n=+12-3

We simplify left and right side of the equation. 
+3n=+9

We divide both sides of the equation by 3 to get n. 
n=3

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