If the system of equation `{:(,x-2y+z=a),(2x+y-2z=b),and,(x+3y-3z=c):}`
have at least one solution, then

If the system of equations x - 2y +z = a , 2x + y - 2z = b, x +3y - 3z = c, has at least one solution, then a) a + b + c = 0 b) a - b + c = 0 c) -a + b + c = 0 d) a + b - c = 0

The system of equations {:(x+2y+3z=4),(2x+3y+4z=5),(3x+4y+5z=6):} has …………… solutions

The system of equations -2x+y+z=a x-2y+z=b x+y-2z=c has

The system of equations -2x+y+z=a x-2y+z=b x+y-2z=c has