30-3n=9

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Solution for 30-3n=9 equation: 


Simplifying
30 + -3n = 9

Solving
30 + -3n = 9

Solving for variable 'n'.

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

Add '-30' to each side of the equation.
30 + -30 + -3n = 9 + -30

Combine like terms: 30 + -30 = 0
0 + -3n = 9 + -30
-3n = 9 + -30

Combine like terms: 9 + -30 = -21
-3n = -21

Divide each side by '-3'.
n = 7

Simplifying
n = 7

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