13-n=9

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Solution for 13-n=9 equation: 


Simplifying
13 + -1n = 9

Solving
13 + -1n = 9

Solving for variable 'n'.

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

Add '-13' to each side of the equation.
13 + -13 + -1n = 9 + -13

Combine like terms: 13 + -13 = 0
0 + -1n = 9 + -13
-1n = 9 + -13

Combine like terms: 9 + -13 = -4
-1n = -4

Divide each side by '-1'.
n = 4

Simplifying
n = 4

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