Verified answer

x + 4y - z = 1

3x - y + 8z = 0

x + 4y - z = 10

First and third

equations are

contradictory.

x + 4y - z = 1 , 3x - y + 8z = 0 , x + 4y - z = 10

x + 4y = 1+z , 3x - y + 8z = 0 , x + 4y= 10+z

first and third equation, doesnt make any sense, check the question again

The first and last equations have the same thing on the left, but different numbers on the right. If you set them equal, you get 1 = 10, which is impossible. There is no solution.

The first and third equations are incompatbile, There is no solution.