120-y-15=0

Solution for 120-y-15=0 equation:

Simplifying
120 + -1y + -15 = 0

Reorder the terms:
120 + -15 + -1y = 0

Combine like terms: 120 + -15 = 105
105 + -1y = 0

Solving
105 + -1y = 0

Solving for variable 'y'.

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

Add '-105' to each side of the equation.
105 + -105 + -1y = 0 + -105

Combine like terms: 105 + -105 = 0
0 + -1y = 0 + -105
-1y = 0 + -105

Combine like terms: 0 + -105 = -105
-1y = -105

Divide each side by '-1'.
y = 105

Simplifying
y = 105