penyelesaian dari SPLTV x+y=9 2y+3z=7 x-2y=4 maka nilai x-y+z adalah

x+y=9
x-2y=4-
________
3y=5
y=5/3
x+y=9
x+5/3=9
x=27/3-5/3=22/3
2y+3z=7
10/3+3z=7
3z=21/3-10/3
z=11/9
x-y+z=22/3-5/3+11/9
=17/3+11/9
=51/9+11/9=62/9

maaf kalau salah

* x+y =9 (1)
2y+3z=7 (2)
x-2y=4 (3)
*eliminasi 1&3
x+y=9
x-2y=4
= 3y=5
y =5/3

* 2y+3z = 7
2(5/3) +3z=7
z = 11/9
* x+y= 9
x + 5/3 = 9
x = 22/3

* X-Y+Z
= 22/3-5/3+11/9
= 62/9
= 6 8/9