Answer:
8 liters
Explanation:
Given that:
y = 2x
where y is the number of scoops of juice mix, and x is the liters of water required.
To determine the liters of water required for 16 scoops of juice mix;
y = 16
So that,
16 = 2x
x =

= 8
x = 8 liters
Therefore, Austin would combine 8 liters of water to the 16 scoops of juice mix.