6+9=n

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Solution for 6+9=n equation: 


Simplifying
6 + 9 = n

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

Solving
15 = n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
15 + -1n = n + -1n

Combine like terms: n + -1n = 0
15 + -1n = 0

Add '-15' to each side of the equation.
15 + -15 + -1n = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -1n = 0 + -15
-1n = 0 + -15

Combine like terms: 0 + -15 = -15
-1n = -15

Divide each side by '-1'.
n = 15

Simplifying
n = 15

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