Can u help me with 1/2 plz

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

3x + 4y = 5 x- 3y = -7 solve by substitution