If `3x + 2y + 4z = 20, 5x + 7y - 9z = - 10` which of the following can be a set of values of x , y and z ?

Solve the following by Cramer's rule : 5x-y=9, 3x+y=7, x+y+z=4

Add the following: (i) x – 3y – 2z , 5x + 7y – 8z , 3x – 2y + 5z

Add the following: (i) x – 3y – 2z , 5x + 7y – 8z , 3x – 2y + 5z

If (x,y,z) is the solution of the equations 4x + y = 7 3y + 4z = 5 5x + 3z = 2 Then the value of x + y + z equals

Add the following expressions: 2x+9y-7z, 3y+z-3x, 3z-4y-x

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

Solve the following set of equations 2x+3y -z = 9; x +y +z = 9; 3x - y - z = -1 .