How many ounces of pure cranberry juice and how many ounces of citrus fruit drink containing 10% fruit should be mixed to get 120 oz of a fruit drink that is 25% fruit juice?

Question

hero · Answer

x = pure cranberry
y = citrus fruit

x + y = 120
x + .10(y) = .25(120)

anonymous · Answer

Thank you @Hero  :).

hero · Answer

It's not complete yet

hero · Answer

x + y = 120
x + .10y = 30

.90y  = 90
     y = 90/.90
 
     y = 100
     x = 20

hero · Answer

@marialaffytaffy did you have a question?

anonymous · Answer

I understand it now, haha Thanks for asking though

anonymous · Answer

@Hero I'm actually a bit confused. How did you get .90?

hero · Answer

Let me show you this way:

y - .10y = (1 - .10)y = (.90)y = .90y

hero · Answer

Remember, 

y = 1y

hero · Answer

I hope I didn't confuse you.

anonymous · Answer

@Hero  ahh okay ! Thank you :)