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Anscocr.{:[x+2y-2z=3=>x+2y-2z-3=0(Ax+B_(y)+C_(z)+D_(1)=0)],[2x+4y-4z=7=>2x+4y-4z-7=0(A^(')x+B^(')y+C^(')z+D_(2)=0)],[" distance blw tiooplanes "=d=(|D_(2)-D_(1)|)/(sqrt(A^(2)+B^(2)+C^(2)))],[=(1-7+3∣)/(sqrt((1)^(2)+(2)^(2)+(-2)^(2)) ... See the full answer