Answer:
There are 8 liters of cranberry juice in the punch
Step-by-step explanation:
Part A
We know that of the punch, 80% is cranberry juice.
Let's call Z the amount of cranberry juice and Y is the amount of ginger ale.
Let's call X the amount of Ponche
The amount of punch is equal to the amount of cranberry juice plus the amount of ginger ale
(i)
Then we know that:
(ii)
We also know that:
liters (iii)
Part B.
Now we can solve the equation:
Replace (ii) and (iii) in (i)




X = 10 liters.
Now we substitute X = 10 in equation (ii) and find the amount of Cranberry juice.

Z = 8 liters.
There are 8 liters of cranberry juice in the punch