Malcome is trying a very love carbohydrate diet. He would like to keep the number of carbs consumed in grams between the levels skin in the following compound inequality (9th-grade Algebra 1)

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?