planes

Question : Find intersection points of two planes 3x-y+2z-4=0 , 9x-7y+z+2=0 Solution : Given equations of two planes 3x-y+2z-4=0 3x-y+2z=4 (1) and 9x-7y+z+2=0 9x-7y+z=-2 (2) Writing equations (1) and (2)…