Systems of three variables using matrices

[Hyunqul]

Hello,

i have been trying to self-study matrices topics, during that I came across two complicated problems, and I wish I could provided with help to solve them :

The question asks to solve each of the following system of equations, using row reduction method


First system :










Second system :






Thanks.

 

[Walter]

There has got to be a clearer way to type that out.

 

[Hyunqul]

Sorry I didn't know how to formulate the equations..I edited them.

 

[Hyunqul]

Thank you for your response

So, do I have to simplify and then start solving normally...or make it in a form like : Let log4=t, so 2log4 will equal : 2t ?

Thanks.