Four more than three times a number is greater that nineteen.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce