5 6 7y =- 4 2y 0 9 ) 2 4 July 8, 2019 16 32 64 128 5 6 7y =- 4 2y 0 9 )+ 2 4 5) 0 3(6 - 2y) = 4 5 - 0 7(y + 9) 6xy - 4y + 6 - 9x
