Question

A chemical manufacturer wishes to fill an order for 700 gallons of a 24% acid solution. Solutions of 20% and 30% are in stock.


How many gallons of 20% acid solution will be used in the desired mixture?

Answer 1

amount of the 20% stuff ---- x gallons
amount of the other stuff ---- 700-x

.2x +.3(700-x) = .24(700)

solve for x to reveal the mystery.

Answer 2

x = 420