Question

A student is trying to solve the set of two equations given below:

Answer 1

If you would like to eliminate the z-term, you can do this using the following steps:

x + z = 6       /*(-2)
3x + 2z = 1
_____________
-2x -2z = -12
3x + 2z = 1
_____________
-2x + 3x = -12 + 1
x = -11

The correct result would be x + z = 6       /*(-2).