A recipe for sparkling apple juice calls for 7/8 quarts of the sparkling water and 2/5 quarts of apple juice. How muxh sparkling water would you need to mix with 8 quarts of apple juice?

18 quarts.  

Step-by-step explanation: x = ((9) / (3/4)) * (1 1/2)

 x = ((9) * (4/3)) * (1 1/2)

x = (36/3) * (1 1/2)

x = (12) * (1 1/2)

x = (12) * (3/2)

x = 18

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x