[" 5."x+2y-z=0],[" 3x "+y+z=7],[" 2z-y+2x= 7"]

The system 2x + 3y + z= 5, 3x + y + 5z =7, x + 4y -2z=3 has

Solve the system: x + y - 2z = 0, 2x - 3y + z = 0, 3x - 7y + 10z = 0, 6x - 9y + 10z = 0.

x+y+z=6 x + 2z =7, 3x + y + z = 12

Solve using matrices, for x,y and z: 2x-y-z = 7, 3x+y - z = 7, x + y - z = 3.

2x + 3y-5z = 7, x + y + z = 6,3x-4y + 2z = 1, then x =

Prove that the lines 3x + 2y + z – 5 = 0 = x + y – 2z – 3 and 2x – y – z = 0 = 7x + 10y – 8z – 15 are perpendicular