A certain shade of green paint is made from 5 parts yellow mixed with three parts blue if 2 cans of yellow are used how many cans of blue should be used

Because the ratio of yellow to blue can be expressed as 5/3, you would solve the equation 5/3 = 2/x. To solve, you would get x alone by cross multiplying and getting 5x=6. Divide both sides by 5 and get 6/5 or 1 and 1/5 cans of blue paint