tolong isi nomor 2 dengan bnar

2x+4y+2= 0 => (x3) = 6x+12y+6 =0 => 6x+12y=-6        x=> 6x-2y  = 22
3x-y-11  = 0=>  (x2) = 6x - 2y- 22=0 => 6x-2y  =22               6x-2.-2= 22
                                                              ___________-          6x+4 = 22
                                                                     14y=-28                6x=18
                                                                        y = -2                   x=3
jadi, a-b ialah 3-(-2) = 3+2 = 5