Question

how many pounds of gravel that cost $2.50 per pound must be mixed with 6 pounds of cement that cost $1.50 per pound to make a mixture that cost $2.50 per pound?

Answer 1

(25 * 5.5) + (x * 2.9) + [(25 - x) * 4.4] = 50 * 4.5

Answer 2

(25 * 5.5) + (x * 2.9) + [(25 - x) * 4.4] = 50 * 4.5

Explanation:

0.5 * 50Lbs. = 25 Lbs.

12.5 Lbs

12.5 Lbs.