Question

There is a mound of g pounds of gravel in a quarry. Throughout the day, 300 pounds of gravel is added to the mound. Two orders of 700 pounds are sold and the gravel is removed from the mound. At the end of the day, the mound has 1,100 pounds of gravel.

Answer 1

g = g0 + 300 - 1400 = 1100 describes gravel present

g0 = 2200 pounds originally present

Check:

2200 + 300 - 1400 - gravel present at end of day = 1100 lbs