How do I reduce the argumented matrix before solving?

[theoneadamk]

How do I reduce the argumented matrix before solving ?

x + x2 + 2x3 = 5
3x + 2x2
2x - x3 = 2

 

[soroban]

Re: The Matrix

Hello, theoneadamk!

You left out part of the problem . . .
And what does "reduce . . . before solving" mean?

How do I reduce the argumented matrix before solving ?

\(\displaystyle \begin{array}{ccccccc}x_1 & + & x_2 &+& 2x_3 & \;=\; & 5 \\
3x_1 & + & 2x_2 & & & = & ?\\
2x_1 & & & - & x_3 & = & 2 \end{array}\)