mzc2ayleSandn mzc2ayleSandn 19-07-2016 Mathematics contestada which linear system has been correctly solved for one of the variables from the following system? 2x - y = -1 2x y = -7 2x - y = -1 y = 2x - 7 2x - y = -1 y = -2x 7 y = 2x 1 2x y = -7 y = -2x 7 2x y = -7