Answer:
(3x - 8) pounds of gravel was used to cover the bottom of sinks, where x is the weight of bag of gravel.
Step-by-step explanation:
We are given the following information in the question:
In order to answer this question we need to make the following assumption
Let x pound be the weight of one bag of gravel.
Total number of bags of gravel bought by Kevin = 3
Weight of 3 bags of gravel = 3x pounds
Amount of gravel left after pouring = 8 pounds
Amount of gravel used to cover the bottom of sink =
Formula:
![\text{Amount of gravel used to cover the bottom of sink} = \\\text{Amount of gravel bought} - \text{Amount of gravel left}\\= 3x -8](https://tex.z-dn.net/?f=%5Ctext%7BAmount%20of%20gravel%20used%20to%20cover%20the%20bottom%20of%20sink%7D%20%3D%20%5C%5C%5Ctext%7BAmount%20of%20gravel%20bought%7D%20-%20%5Ctext%7BAmount%20of%20gravel%20left%7D%5C%5C%3D%203x%20-8)
Thus, (3x - 8) pounds of gravel was used to cover the bottom of sinks.