Tentukan nilai x+z dari x+y=1 y+z=6 2x+y+z=4

x + y = 1
y + z = 6
_______ -
x - z = -5

y + z = 6
2x + y + z = 4
_________ -
2x = 2
x = 1

x + y = 1
1 + y = 1
y = 0

y + z = 6
0 + z = 6
z = 6

nilai x + z = 1 + 6 = 7

*maaf kalau salah*