Question

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

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

i did that

Answer 6

So what is the problem you have?

Answer 7

what do i do next?

Answer 8

Did you reduce the augmented matrix?

Answer 9

yes

Answer 10

but what do I do next

Answer 11

What is your reduced matrix?

Answer 12

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

Answer 13

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

Answer 14

can you show me the steps