Question

Solve the following systems of equations:

x -y + z =4

x-2y -2z = 9

2x +y +3z =1

Answer 1

We have,

From equation (i), we get

Subtracting the value of z in equation (ii), we get

Subtracting the value of z in equation (iii), we get

Adding equations (iv) and (v), we get

Hence, solution of the giving system of equation is

x =3, y=-2, z=-1.