Answer:
8 liters of 15% solution and 72 liters of 65% solution
Step-by-step explanation:
If x is the liters of 15% solution, and y is the liters of 65% solution, then:
x + y = 80
0.15x + 0.65y = 0.60(80)
Solve the system of equations with substitution or elimination. Using substitution:
0.15x + 0.65(80 − x) = 0.60(80)
0.15x + 52 − 0.65x = 48
4 = 0.5x
x = 8
y = 72
You need 8 liters of 15% solution and 72 liters of 65% solution.
