Juice-O-Rama is a refreshment stand specializing in a fruit drink mixture of orange juice and prune juice. The orange juice costs $1.20 per liter and the prune juice costs $1.40 per liter. If they need 8 liters of the final drink at a cost of $1.24 per liter, how many liters of each juice will they need to make their specialty drink?

Question

anonymous · Answer

I have trouble with these. However I came up with the following answer. Oranges is 6.4 litres and Prunes is 1.6 litres.
I came up with the following two equations. 
1.2R + 1.4P = 9.92
8 = R + P

anonymous · Answer

R being oranges because I hate putting O as a variable.

anonymous · Answer

i dont get it...

anonymous · Answer

Do you know how to solve simultaneous equations? Or the model that you don't get?