100-39=n

Solution for 100-39=n equation:

Simplifying
100 + -39 = n

Combine like terms: 100 + -39 = 61
61 = n

Solving
61 = 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.
61 + -1n = n + -1n

Combine like terms: n + -1n = 0
61 + -1n = 0

Add '-61' to each side of the equation.
61 + -61 + -1n = 0 + -61

Combine like terms: 61 + -61 = 0
0 + -1n = 0 + -61
-1n = 0 + -61

Combine like terms: 0 + -61 = -61
-1n = -61

Divide each side by '-1'.
n = 61

Simplifying
n = 61