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persamaan 1&2
3x+2y-z=-2
2x+4y-z=3
_________-
x-2y=-5 > persamaan 4
eliminasi z persamaan 1&3
3x+2y-z= -2
x+3y+z=8
_________+
4x+5y=6 > persamaan 5
SPLDV pers. 4&5
x-2y=-5 |x 4
4x+5y=6
4x-8y=-20
4x+5y=6
________-
-13y=-26
y=2
subsitusikan ke pers. 4
x-2y=-5
x-4=-5
x=-1
subsitusikan x&y ke pers. 3
x+3y+z=8
-1+6+z=8
5+z=8
z=3
(-1,2,3)
x.y.z=
-1.2.3
=-6