5 5y 8 July 8, 2019 16 32 64 128 5y 5 8 10 5y 5 80 5y 5 8y − 13 3y 5 5y 8 16 5y 5 (- 8 y 2 y 5 )- 5y 8 5y 5 4y 8 3y 5 =- 8 5y 6 5y 5 6y 8 8y 5 5y 3 y 9 4x 5y 5 8x 5y 25 5y 8x =- 5 solve for y 5y 8x =- 5 8y 5 5y 3