3 7x 2 5y 1 6x 4 8y July 8, 2019 16 32 64 128 3x + 2y = 6 6 7 - 3(2x - 5y) = 2(x - y) 4(x-2y)+7.6=5(2x+y) 6xy - 4y + 6 - 9x 6) - 7(- 4x + 3) + 2(3x - 7) = b) 4 5(- 8y - 7) - 3 9(6 - 9y) =
