Invent a data set with five numbers that has a mean of 10 and a median of 12

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?