Answer:
The answer is 20.25.
Explanation:
Multiple 1/4 to 4x and 15. 1x (or x) + 3.75 = 24. Subtract 3.75 from 24, 20.25. This leaves you with x = 20.25. A way to check this would be 1/4(4(20.25) + 15) = 24. 4 x 20.25 is 81, 81 + 15 is 96, 96 x 1/4 = 24.