Question

Solve the following systems of equations:
x-y+z =4
x- 2y -2z = 9
2x +y +3z =1

Answer 1

We have,

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

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

Hence, solution of the giving system of equation is x=3, y = -2 , z = -1