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2x+3y-z= 8 ....(2)
x-2y+3z= 6 ....(3)
(1) & (2)
x+y+z= 8
2x+3y-z= 8 +
3x+4y= 16 ....(4)
(1) & (3)
x+y+z= 8 ×3
x-2y+3z= 6 ×1
3x+3y+3z= 24
x-2y+3z= 6 -
2x+5y= 18 ....(5)
(4) & (5)
3x+4y= 16 ×2
2x+5y= 18 ×3
6x+8y= 32
6x+15y= 54 -
-7y = -22
y = 3,14
(5)
2x+5y= 18
2x+15,7= 18
2x= 2,3
x= 1,15
(1)
1,15+3,14+z= 8
z= 3,71