Question 129768
How many pounds of seed worth $0.60 a pound must be mixed with 300 pounds of seed worth $0.35 a pound to get a mixture worth $0.50 per pound

let name x the answer

total cost is 0.6x+0.35(300)
and total pounds are x+300

then  (0.6x+105)/x+300 =0.5
then  0.6x+105=0.5x+150
then  0.1x+105=150
then  0.1x=45
then x=450