I have a system of equations(adsbygoogle = window.adsbygoogle || []).push({});

2x + 4y - z = 2

x - y + 2z = 1

I need to find a third equation so that there is a unique solution for the unknows x , y and z, and find them.

Please help

Thanks,

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Need help with this have exam tommorow.

**Physics Forums | Science Articles, Homework Help, Discussion**