Answer:
Amount of gravel used = (3x - 6) pound
Step-by-step explanation:
Given:
Amount of beg = 3
Each bag contain gravel = x pound
Left amount of gravel = 6 pound
Find:
Amount of gravel used
Computation:
Amount of gravel used = (Amount of beg)(Each bag contain gravel) - Left amount of gravel
Amount of gravel used = (3)(x) - 6
Amount of gravel used = (3x - 6) pound