perhatikan sistem persamaan linear berikut 4x+2y = 76 ..(1) 5x +2z = 66 ..(2) 4y+3z = 72 ..(3) himpunan penyelesian daru sistrm persamaan tersubut adalah

4x + 2y = 76 I x2 I = 8x + 4y= 152
4y+ 3z  = 72 I x1 I = 4y + 3z= 72    -
                              = 8x - 3z=  80

5x+ 2z = 66 I x8 I = 40x + 16z= 528
8x - 3z = 80 I x5 I = 40x -  15z= 400 -
                             = 16z + 15z= 128
                             = 31z= 128
                                z = 4,13

4y + 3z         = 72
4y + 3(4,13) = 72
4y + 12,39   = 72
4y = 72 - 12,39
4y = 59,61
y   = 14,9

4x + 2y    = 76
2x + y      = 38
2x + 14,9 = 38
2x = 38 - 14,9
2x = 23,1
x = 11,55

HP = {x= 11,55  y= 14,9  z= 4,13}