4x+3y+z=16 2x+7y+3z=8 x-3y-2z=-14 Himpunan penyelesaian

4x+3y+z=16
x-3y-2z=-14
_________ +
5x-z= 2...............(1)

4x+3y+z=16 |x7|
2x+7y+3z=8 |x3|
→ 28x+21y+7z = 112
6x + 21y+ 9z= 24
_______________ -
22x -2z =88
11x-z=44..........(2)

elimasi (1) dan (2)
5x-z =2
11x-z = 44
________-
-6x= -42
x= 7

5x-z =2
35-z =2
z= 33

4x+3y+z= 16
28+3y+33= 16
3y= -45
y= -15