Solve the following equations by inverse method :
`x + 3y + 3z = 12, x + 4y + 4z = 15, x + 3y + 4z = 13`

Solve the following equations by inverse method : x + z = -1 , y +z = - 4, 4x + y + z = 0 .

Solve the following equations by reduction method : x - y + z = 4, 2x + y - 3z = 0 , x + y + z = 2

Exaniming consistency and solvability, solve the following equations by matrix method. x + 2y + 3z =14 , 2x -y + 5z = 15 , 2y + 4z-3x = 13

Solve the following equations by the method of reduction: x+3y+3z = 12 , x+4y+4z = 15 , x+3y+4z=13