Solve the plane equation which passes through point (1,2,1) and is perpendicular to two planes x + y = 0 and 5Y + Z = 0?

Solve the plane equation which passes through point (1,2,1) and is perpendicular to two planes x + y = 0 and 5Y + Z = 0?

X + y = 0x = - Y5y + Z = 0z = - 5y5x = - 5Y = Z this line is the intersection of two planes, the direction vector is (1 / 5, - 1 / 5,1) and the two planes are perpendicular to this line, so the normal vector of the plane is (1 / 5, - 1 / 5,1) through (1,2,1), so the plane equation is 1 / 5 × (x-1) - (1 / 5) (Y-2) + Z-1 = 0