solving system of equations using Matrices with 3 variables...
3x – 3y + 5z = 13
5x + 6y – 2z = 10
7x + 5y = 18

Question

solving system of equations using Matrices with 3 variables...
3x – 3y + 5z = 13
5x + 6y – 2z = 10
7x + 5y = 18

thomas5267 · Answer

Are you allowed to use graphing calculators or something like that?

thomas5267 · Answer

Just do Gaussian elimination by hand if you can't use a graphing calculator.

anonymous · Answer

no i can I just don't know what to do next after i get the matrix equation

thomas5267 · Answer

Form a augmented matrix.
$$
\begin{bmatrix}
3&-3&5&13\
5&6&-2&10\
7&5&0&18
\end{bmatrix}
$$

anonymous · Answer

i did that

thomas5267 · Answer

So what is the problem you have?

anonymous · Answer

what do i do next?

thomas5267 · Answer

Did you reduce the augmented matrix?

anonymous · Answer

yes

anonymous · Answer

but what do I do next

thomas5267 · Answer

What is your reduced matrix?

anonymous · Answer

-10/13 -25/13  24/13
14/13   35/13   -3/13
17/13   36/13  -33/13

thomas5267 · Answer

Reduce the augmented matrix, not to coefficient matrix...

anonymous · Answer

can you show me the steps