Answer: one pound of apple costs $3.825
Explanation:
Let x represent the cost of one pound of apple.
Total amount spent on 2 lbs of apple and 3 lbs of grapes is $15
The grapes cost $2.45 per pound. This means that the total cost of 3 lbs of grapes would be
2.45 × 3 = $7.35
Since Cindy spent a total of $15, it means that
2x + 7.35 = 15
Subtracting 7.35 from both sides of the equation, it becomes
2x + 7.35 - 7.35 = 15 - 7.35
2x = 7.65
x = 7.65/2 = $3.825