Hurry ! which equation can be used to find the answer? a contractor needs 36 bags of cement to do a job. she already has 17 bags. how many more bags does she need to do the job? a. 2 · b = 36 b = 18 18 bags b. b + 17 = 36 b = 19 19 bags c. b ÷ 2 = 17 b = 34 34 bags d. b – 17 = 36 b = 53 53 bags