7n+15=9n-9+4n

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Solution for 7n+15=9n-9+4n equation:


Simplifying
7n + 15 = 9n + -9 + 4n

Reorder the terms:
15 + 7n = 9n + -9 + 4n

Reorder the terms:
15 + 7n = -9 + 9n + 4n

Combine like terms: 9n + 4n = 13n
15 + 7n = -9 + 13n

Solving
15 + 7n = -9 + 13n

Solving for variable 'n'.

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

Add '-13n' to each side of the equation.
15 + 7n + -13n = -9 + 13n + -13n

Combine like terms: 7n + -13n = -6n
15 + -6n = -9 + 13n + -13n

Combine like terms: 13n + -13n = 0
15 + -6n = -9 + 0
15 + -6n = -9

Add '-15' to each side of the equation.
15 + -15 + -6n = -9 + -15

Combine like terms: 15 + -15 = 0
0 + -6n = -9 + -15
-6n = -9 + -15

Combine like terms: -9 + -15 = -24
-6n = -24

Divide each side by '-6'.
n = 4

Simplifying
n = 4

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