Luka is making lemonade to sell at a school fundraiser

Luka is making lemonade to sell at a school fundraiser

Luka is making lemonade to sell at a school fundraiser. His recipe requires 4 times as much water as sugar and twice as much sugar as lemon juice. He uses 3 cups of lemon juice. How many cups of water does he need?

(A) 6 (B) 8 (C) 12 (D) 18 (E) 24

answer：E