Nilai x, y, z dari persamaan linier, 2x = 6 ; 3x - y + z = 6; x + 2y - z = 8. Maka, nilai z + y =

2x = 6
x = 3

3x - y + z = 6
9 - y + z = 6
y - z = 3 

x + 2y - z = 8
2y - z = 5

y - z = 3
2y - z = 5
________ +
3y = 8
y = 8/3

8/3 - z = 3
z = 8/3 - 9/3
z = - 1/3

z + y = 8/3 + (-1/3)
= 7/3

Mohon maaf apabila ada kesalahan