Question 470282
how much alcohol in pints must be added to 80 pints of a solution of alcohol and iodine that is 20 percent iodine in order to produce a 15 percent solution of iodine
Let x = amount of alcohol (pints) added
then
.20(80) = .15(80+x)
16 = 12+.15x
4 = .15x
4/.15 = x
26.67 pints = x