Question

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

Equation A: x + z = 6


Equation B: 3x + 2z = 1

Which of the following is a possible step used in eliminating the z-term

Answer 1

Multiply equation A by -2

Explanation:

I took the test!

Answer 2

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).