Problema Solution
How many liter each of a 12 % acid solution and a 20% acid solution should be mixed in order to obtain 4 liters of a 15% acid solution?
Answer provided by our tutors
0.12x+0.20y=0.6
x+y=4
=> x=4-y
Putting in 1st,
0.12(4-y)+0.20y=0.6
0.48-0.12y+0.20y=0.6
0.08y=0.12
y=1.5
x=4-y=2.5
2.5 liters of 12% and 1.5 liters of 20% solution