Question

Persamaan linier tiga variabel
2x + y + z = 8
3x -y + 2z = 17
4x + 2y -z = 1

x+3y+z=4
2x + 2y + 3z =15
3x + y-2z = -1

x+2y+z=4
2x+y+z=16
x+y+2z=9

Answer 1

Ini nomor 1 yah^^ nmr 2 dan 3 ga dapat hp nya, maaf

Answer 2

1
2x+y+z=8
3x-y+2z=17 +
5x+3z=25

3x-y+2z=17    x2
4x+2y-z=1   x1

6x-2y+4z=34
4x+2y-z=1      +
10x+3z=35

5x+3z=25
10x+3z=35 -
-5x=-10
x=2

5x+3z=25
10+3z=25
3z=15
z=5

2x+y+z=8
4+y+5=8
y=-1

2.
x+3y+z=4          x2
2x+2y+3z=15   x1
 
2x+6y+2z=8
2x+2y-3z=15 -
4y+5z = -7

2x+2y+3z=15  x3
3x+y-2z=-1      x2

6x+6y+9z=45
6x+2y-4z=-2    -
4y+13z=47

4y+5z=-7
4y+13z=47 -
-8z=-54
z=54/8=27/4

4y+5z=-7
4y+135/4=7
4y=-107/4
y=-107/16

x+3y+z=4
x-107/16+27/4=4
x=107/16+64/16-108/16
x=63/16

3.
x+2y+z=4    x 2
2x+y+z=16  x 1

2x+4y+2z=8
2x+y+z=16    -
3y+z=-8

2x+y+z=16  x1
x+y+2z=9    x2

2x+y+z=16
2x+2y+4z=18-
-y-3z=-2

3y+z=-8  x1
-y-3z=-2  x3

3y+z=-8
-3y-9z=-6 -
10z=-2
z=-1/5

-y-3z=-2
-y+3/5=2
y=-7/5

x+2y+z=4
x-14/5-1/5=4
x=7

Semoga Membantu