Problema Solution
A chemist mixes some 70% solution with some 40% solution to obtain 120 gallons of 50% solution. Find the number of gallons of each solution.
Answer provided by our tutors
Let
x = gallons of 70% solution
y = gallons of 40% solution
x + y = 120
0.70x + 0.40y = 0.50*120
........
click here to see the system of equations solved for x and y
........
x = 40 gal
y = 80 gal
The chemist will use 40 gallons of the 70% solution and 80 gallons of the 40% solution.