7x 18 4 x 3 )- 6 July 8, 2019 16 32 64 128 X 4 6x 3 7x 2 18 0 6) (18x - 19) - (4 - 7x) = - 73 r) - 3(4 - 5y) + 2(3 - 6y) = - 39
