samia needs to subtract 37 from 54 she cant subtract 7 from 4 so she subtracts 4 from 7 will she get the right answer? Explain how you know​

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge