30-4n=9n-9

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Solution for 30-4n=9n-9 equation:


Simplifying
30 + -4n = 9n + -9

Reorder the terms:
30 + -4n = -9 + 9n

Solving
30 + -4n = -9 + 9n

Solving for variable 'n'.

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

Add '-9n' to each side of the equation.
30 + -4n + -9n = -9 + 9n + -9n

Combine like terms: -4n + -9n = -13n
30 + -13n = -9 + 9n + -9n

Combine like terms: 9n + -9n = 0
30 + -13n = -9 + 0
30 + -13n = -9

Add '-30' to each side of the equation.
30 + -30 + -13n = -9 + -30

Combine like terms: 30 + -30 = 0
0 + -13n = -9 + -30
-13n = -9 + -30

Combine like terms: -9 + -30 = -39
-13n = -39

Divide each side by '-13'.
n = 3

Simplifying
n = 3

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