Mara needs to mix some 30% acid solution and some 70% alcohol solution to end up with 20 liters of 54% solution. how many liters of the 70% solution will she need? type in your numerical answer only; do not type any words or letters with your answer.

a = volume of 30% solution in liters

b = volume of 70% solution in liters

0.3a + 0.7b = 0.54(a+b)

a+b = 20

solve the system of

a = 8

b = 12

answer: i realy don't get it that much can you me figer it out pleas you

step-by-step explanation:

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

hope this .