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(1) x-y+z=4
(2) x-y-z= 0
(3) x+y+z= 10
(1) x-y+z= 4
(2) x-y-z= 0 -
2z=4
z=2
(2) x-y-z=0
(3) x+y+z=10 -
-2y-2z=-10 | ×-1
2y+2z= 10 (4)
(4) 2y+2z=10
2y+2(2)=10
2y= 10-4
2y=6
y=3
nilai y dan z dimasukkan ke salah satu dari 3 persamaan, kita gunakan saja:
(1) x-y+z= 4
x-(3)+2=4
x-1=4
x=4+1= 5
(x,y,z) --> (5,3,2)
HP= {(5,3,2)}