9n=21+2n

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Solution for 9n=21+2n equation: 


Simplifying
9n = 21 + 2n

Solving
9n = 21 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
9n + -2n = 21 + 2n + -2n

Combine like terms: 9n + -2n = 7n
7n = 21 + 2n + -2n

Combine like terms: 2n + -2n = 0
7n = 21 + 0
7n = 21

Divide each side by '7'.
n = 3

Simplifying
n = 3

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