n+9(-n)=3+15

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Solution for n+9(-n)=3+15 equation: 


Simplifying
n + 9(-1n) = 3 + 15

Remove parenthesis around (-1n)
n + 9 * -1n = 3 + 15

Multiply 9 * -1
n + -9n = 3 + 15

Combine like terms: n + -9n = -8n
-8n = 3 + 15

Combine like terms: 3 + 15 = 18
-8n = 18

Solving
-8n = 18

Solving for variable 'n'.

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

Divide each side by '-8'.
n = -2.25

Simplifying
n = -2.25

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