Question

Landyn wants to mix concentrate and water together to make her juice. The juice is 15% concentrate and 85% water. Her pitcher can hold 12 cups of juice. How many cups of concentrate does she need?

Answer 1

since the concentrate is 100% juice, and the water is 0% juice, we have

100x + 0(12-x) = 15(12)
x = 1.8