Mixed numbers between 5 and 7, with an interval of 1 / 3 between each pair of mixed numbers

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

Can someone explain to me how to do