Nilai z yang memenuhi SPLTV 2x+y=4 x+2z=3 3y-z=5 Sama dengan...

3y-z = 5
x+2z = 3

6y-2z = 10
x+2z = 3
________+
x+6y = 13
2x+y = 4

2x+12y = 26
2x+y = 4
_________-
11y = 22
y = 2

substitusikan ke persamaan 3y-z = 5
3*2 - z = 5
6-z = 5
z = 1