if 2 small containers and 1 large container together hold 10 cups of water, and 1 large container minus 1 small container leaves 4 cups of water, how many cups of water does the large container hold.
2S + L = 10
L-S = 4
2S + S+4 = 10
3S = 6
S = 2
small = 2 cups,
large = 6 cups