Im confused in this one. Please help.

What is the least common factor of 6 and 8

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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