-111+21=15w

Solution for -111+21=15w equation:

Simplifying
-111 + 21 = 15w

Combine like terms: -111 + 21 = -90
-90 = 15w

Solving
-90 = 15w

Solving for variable 'w'.

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

Add '-15w' to each side of the equation.
-90 + -15w = 15w + -15w

Combine like terms: 15w + -15w = 0
-90 + -15w = 0

Add '90' to each side of the equation.
-90 + 90 + -15w = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -15w = 0 + 90
-15w = 0 + 90

Combine like terms: 0 + 90 = 90
-15w = 90

Divide each side by '-15'.
w = -6

Simplifying
w = -6