tolong banget jawabannya,pliss

x - y + z = 3
2x + y - 3z = 5
3x + 2y + z = 16

2x - 2y + 2z = 6
2x + y - 3z = 5
------------------- -
-3y + 5z = 1

3x + 2y + z = 16
3x - 3y + 3z = 9
--------------------- -
5y + -2z = 7


-15y + 25z = 5
15y + -6z = 21
--------------------- +
19z = 26
z = 26/19

-3y + 5z = 1
-3y + 5 × 26/19 = 1
-3y + 130/19 = 1
-3y = 1 - 130/19
-3y = 19/19 - 130/19
-3y = -111/19
y = 111/19/3
y = 111/57

x - y + z = 3
x - 111/57 + 26/19 = 3
x = 3 + 111/57 + 26/19
x = 3/19 + 26/19 + 111/57
x = 29/19 + 111/57
x = 1653/1083 + 3219/1083
x = 4872/1083
x = 4,49


maaf kalau salah :)