# Matrix equation with unknown coefficents

• Dec 4th 2011, 01:36 PM
SweatingBear
Matrix equation with unknown coefficents
Supposed to solve

http://draw.to/static/d/45lUmO.png

I get from this following equations

6y-2=1
5y-2=0

x-5=1
x-6=0

But there are no solutions for y!!! The book says that
x=6 and y=1

How?!
• Dec 4th 2011, 03:28 PM
ymar
Re: Matrix equation with unknown coefficents
You're correct, there are no solutions.
• Dec 4th 2011, 11:47 PM
Opalg
Re: Matrix equation with unknown coefficents
Quote:

Originally Posted by SweatingBear
Supposed to solve

http://draw.to/static/d/45lUmO.png

I get from this following equations

6y-2=1
5y-2=0

x-5=1
x-6=0

But there are no solutions for y!!! The book says that
x=6 and y=1

How?!

The matrix $\begin{bmatrix}-2&x\\ y&-1 \end{bmatrix}$ is what is wrong. It should be $\begin{bmatrix}\color{red}-5&x\\ y&-1 \end{bmatrix}$.
• Dec 5th 2011, 09:20 AM
SweatingBear
Re: Matrix equation with unknown coefficents
Quote:

Originally Posted by Opalg
The matrix $\begin{bmatrix}-2&x\\ y&-1 \end{bmatrix}$ is what is wrong. It should be $\begin{bmatrix}\color{red}-5&x\\ y&-1 \end{bmatrix}$.

Thx