Lisa will make punch that is 25% fruit juice by
adding pure fruit juice to a 2-liter mixture that is 10% pure fruit juice. How many liters of pure fruit juice does she need to add?

Question

Lisa will make punch that is 25% fruit juice by
adding pure fruit juice to a 2-liter mixture that is 10% pure fruit juice. How many liters of pure fruit juice does she need to add?

lgbasallote · Answer

hmm correct me if im wrong but the equation would be.. x liters of 100% fruit juice + 2 L of 10 % fruit juice = (x+2) liters of 25% fruit juice yes? that is how i remember it..

so...

1(x) + .10(2) = .25(x+2)

lez multiply everything by 100 so no decimals...

100x + 20 = 25(x+2)
100x + 20 = 25x + 50
100x - 25x = 50-20
75x = 30

x = 30/75 = 6/15 = 2/5

2/5 = 0.4 so.. 0.4 Liters yes?

anonymous · Answer

Thanks!

lgbasallote · Answer

hmm so i guess that means that my answer was in the choices huh? yay i still remember this!