7n+2n=81

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Solution for 7n+2n=81 equation:


7n+2n=81

We simplify the equation to the form, which is simple to understand 
7n+2n=81

We move all terms containing n to the left and all other terms to the right. 
+7n+2n=+81

We simplify left and right side of the equation. 
+9n=+81

We divide both sides of the equation by 9 to get n. 
n=9

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