123+7+9=n

Solution for 123+7+9=n equation:

Simplifying
123 + 7 + 9 = n

Combine like terms: 123 + 7 = 130
130 + 9 = n

Combine like terms: 130 + 9 = 139
139 = n

Solving
139 = 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.
139 + -1n = n + -1n

Combine like terms: n + -1n = 0
139 + -1n = 0

Add '-139' to each side of the equation.
139 + -139 + -1n = 0 + -139

Combine like terms: 139 + -139 = 0
0 + -1n = 0 + -139
-1n = 0 + -139

Combine like terms: 0 + -139 = -139
-1n = -139

Divide each side by '-1'.
n = 139

Simplifying
n = 139