Courtesy of Teaching Textbooks: Algebra 1:
"Dryer #1 ate a few socks, but only a few, and dryer #2, the semi-selfish one, had the nerve to eat 4 more socks than #1. However, it was the last dryer - dryer #3 - that was the virtual sock-eating monster. In its short but turbulent life, it actually consumed 7 more socks than #2 did. If all three dryers ate a total of 51 socks, how many did dryer #1 eat?"
This is my kind of problem. It's weird and random and easy.