The number of solutions of the equation . `3x+3y-z=5,x+y+z=3,2x+2y-z=3`

The number of solutions of equations x + y - z=0, 3x - y - z= 0,x - 3y + z = 0 is

The number of solutions of equations x+y-z=0,3x-y-z=0,x-3y+z=0 is

The number of solutions of the equation 3x-y-z=0 -3x+2y+z=0 -3x+z=0 such that x,y,z are non negative integers and x^(2)+y^(2)+z^(2)le81 is

The number of solutions of the system of equations: 2x+y-z=7,\ \ x-3y+2z=1,\ \ x+4y-3z=5 is (a) 3 (b) 2 (c) 1 (d) 0

The number of solutions of the system of equations 2x+y-z=7,x-3y+2z=1, x+3y-3z=5 is

The number of Solutions of the system of equations 2x + y -z = 7, x - 3y + 2z =1, x+4y -3z =5 is