[x-y+2z=7],[3x+4y-5z=-5],[2x-y+3z=12]

Solve the following equation by Matrix Method, 1/x - 1/y +2/z =7, 3/x +4/y -5/z =-5, 2/x - 1/y +3/z =12

2x-3y+5z=16, 3x+ 2y-4z= -4, x + y - 2z =- 3.

3x-4y+2z=-1 2x+3y+5z=7 x+z=2

3x-4y+2z=-1 2x+3y+5z=7 x+z=2

Show that the following system of equations has infinite number of solutions : x+2y+3z=1,3x+4y+5z=2,5x+6y+7z=3