Charles has already broken 14 eggs, and he's breaking eggs at a rate of 12 per minute. Louis has already broken 22 eggs, and he's breaking eggs at a rate of 10 per minute. How many minutes will it take Charles to have broken as many eggs as Louis?
Let the number of minutes =m
14 + 12m =22 + 10m, solve for m
12m - 10m =22 - 14
2m = 8
m = 8 / 2 = 4 minutes - when both of them will have broken the same number of eggs.