How many liters of orange juice

Question

one canned juice drink is 25% orange juice; another is 5% orange juice How many liters of each should be mixed together in order to get 20L that is 17%orange juice?

Answer 1

L1X0.25 + L2X0.05 = 20*0.17

L1 + L2 = 20

-L1 - 0.2L2 = 4*20*0.17 = -13.6 first equation multiplied by -4

0.8 L2= 6.4

L2 = 8 lts

L1 = 12 lts

Check in the first equation.