Express the following equation in matrix form and Solve them by method of reduction `x-y+z=1, 2 x-y=1, 3 x+3y-4z=2`

Express the following equation in matrix form and solve them by the method of reduction: x-y+z = 1 , 2x-y = 1 , 3x+3y-4z = 2

Express the following equation in matrix form and solve them by the method of reduction: x+2y-z = 2 , 3x+y-4z = 8 , 2x-y = 1 .

Express the following equations in the matrix from and solve them by method of reduction : 2x-y+z=1, x+2y+3z=8, 3x+y-4z=1

Express the following equation in matrix form and solve them by the method of reduction: x+y+z = 1 , 2x-y+7z = 7 , 3x+y+2z = 2