20 - h = 15

Answer 1

Solving for h, we can add h to both sides of the equation and subtract 15 from both sides:

20 - h + h = 15 + h

20 = 15 + h

Next, subtract 15 from both sides:

20 - 15 = 15 + h - 15

5 = h

Therefore, h is equal to 5.