0=.20(10h+15)+h

Solution for 0=.20(10h+15)+h equation:

Simplifying
0 = 0.20(10h + 15) + h

Reorder the terms:
0 = 0.20(15 + 10h) + h
0 = (15 * 0.20 + 10h * 0.20) + h
0 = (3 + 2h) + h

Combine like terms: 2h + h = 3h
0 = 3 + 3h

Solving
0 = 3 + 3h

Solving for variable 'h'.

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

Add '-3h' to each side of the equation.
0 + -3h = 3 + 3h + -3h
Remove the zero:
-3h = 3 + 3h + -3h

Combine like terms: 3h + -3h = 0
-3h = 3 + 0
-3h = 3

Divide each side by '-3'.
h = -1

Simplifying
h = -1