Have 1 case of soap. There are 150 bars to each case and I use 300 bars a day. How many cases do I order for seven days?

140. If 150 in 1 case and double that is 300 for 2 cases which she uses everyday. 2 for everyday x a week is 7 x 2 = 14

How many do you need

number of bars of soap needed per day times number of days=number of bars of soap needed

300 per day times 7 days=2100 bars of soap

number of cases times number of bars of soap per case=number of bars of soap

x times 150=2100

divide both sides by 150

x=14

14 cases are needed