add up the alcohol in the parts and make sure it is the same as the alcohol in the mixture. If x liters of pure 100% alcohol are added, then we must have
.40*100 + 1.00*x = .70(100+x)
Now just solve for x
how many liters of pure alcohol must ne added to 100 liters of 40 percent isopropyl alcohol in order to make 70 percent isopropyl alcohol?
1 answer