3+7n+2n=12

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Solution for 3+7n+2n=12 equation: 


Simplifying
3 + 7n + 2n = 12

Combine like terms: 7n + 2n = 9n
3 + 9n = 12

Solving
3 + 9n = 12

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-3' to each side of the equation.
3 + -3 + 9n = 12 + -3

Combine like terms: 3 + -3 = 0
0 + 9n = 12 + -3
9n = 12 + -3

Combine like terms: 12 + -3 = 9
9n = 9

Divide each side by '9'.
n = 1

Simplifying
n = 1

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