-3n+9+8n=7n-8n-9

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Solution for -3n+9+8n=7n-8n-9 equation:


Simplifying
-3n + 9 + 8n = 7n + -8n + -9

Reorder the terms:
9 + -3n + 8n = 7n + -8n + -9

Combine like terms: -3n + 8n = 5n
9 + 5n = 7n + -8n + -9

Reorder the terms:
9 + 5n = -9 + 7n + -8n

Combine like terms: 7n + -8n = -1n
9 + 5n = -9 + -1n

Solving
9 + 5n = -9 + -1n

Solving for variable 'n'.

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

Add 'n' to each side of the equation.
9 + 5n + n = -9 + -1n + n

Combine like terms: 5n + n = 6n
9 + 6n = -9 + -1n + n

Combine like terms: -1n + n = 0
9 + 6n = -9 + 0
9 + 6n = -9

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

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

Combine like terms: -9 + -9 = -18
6n = -18

Divide each side by '6'.
n = -3

Simplifying
n = -3

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