5y 1 )( 3y 8 July 8, 2019 16 32 64 128 7x 3y 1 5y 8x 2 Y 1 5y 3y 8 5y 2 )-( 16 3y 1 )= 8 1-5y 3 5 - y = 8 - 1/3 * (4 5y - 5)