An investor bought 2000 shares of stock. An initial purchase was for $12 per share and a second purchase was for $18 per share. If $27,000 worth of stock was purchased, how many shares were purchased at each price?
A saltwater solution is formed by mixing 3 lbs of salt with 15 gal of water. At this rate how many additional pounds of salt are required for 25 gal of water?
Two word problems relating to systems of equations and ratio and proportion are solved.