Question

solve the system of equations if consistent.
2x-y+3z-9=0,
x+y+z-6=0,
x-y+z-2​

Answer 1

Step-by-step explanation:

2x-y+3z=9. (1)

x+y+z=6. (2)

x-y+z=2 (3)

from 1

x=9+y-3z (4)

put value 4 in 2

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

9+2y-2z=6

y=-3-2z/2(5)

put equ 5 in 3

9+(-3-2z/2-3z)+(-3-2z/2-3z)+z=2

18-6-2z-6z-6-2z-6-2z-6z+2z/2=2

6-14z\2=2

-14z=4-6

z=2/14

z=1/7. (6)

do by yourself