Problema Solution
how many liters of 70%alcohol solution must be added to 50 liters of a 40% alcohol solution to produce a 50% alcohol solution
Answer provided by our tutors
active + active = active
0.70*50 + 1.00x = 0.80(50+x)
35 + x = 40 + .8x
.2x = 5
x = 25