A store mixes Kentucky bluegrass worth $11 per pound and ryegrass worth $14 per pound. The mixture is to sell for $13 per pound. Find out how much of each should be used to make a 588 pound mixture. How many pounds of the Kentucky bluegrass should be in the mixture?
b + r = 588
11b + 14r = 13(588)
multiply the top equation by -11 and then add the two equations together to solve for r. You can then find 6
The first equation gives you the pounds of each
The second equation takes into consideration the value of each.