Problema Solution
Brewmistress Barbara has a vat containing 80 liters of her beer, which has an alcohol content of 8%. She is cheap and unethical, so she plans to add some bud lite (4% alcohol content) to the vat in order to dilute her beer to 7% alcohol content. How many liters of bud lite must she add to her vat?
Answer provided by our tutors
let
b = liters of bud to be added
the 8% of alcohol in 80 liters + 4% of alcohol in b liters = 7% of alcohol in (80 + b) liters
0.08*80 + 0.04*b = 0.07(80 + b)
by solving the equation we find
b = 26.67 liters
click here to see the step by step solution of the equation
She must add 26.67 liters of bud lite.