Question 631783
First lets assume that the cost of an orange is x. That means that the cost of an apple is 4/5*x. So the cost of 50 apples and 20 oranges is 50*4/5*x+20x. Since the cost of 50 apples and 20 oranges is $30, lets set that equal to 30. So we get 50*4/5*x+20x=30, which simplifies to 40x+20x=30, and that simplified is 60x=30. and if we divide each side by 60, we get x=0.50. That means an orange costs $0.50, and an apple costs 4/5 of that price, or $0.40.