how do you use an inverse matrix to solve the linear system 5x+y=6 9x=2y=30
There is an error in your question.
You have 2 equal signs in your second equation.
If we assume your second equation is 5x + 2y = 30 (because there are + and = signs on the same key on many keyboards) then:
No, I don't think so:
Or did you mean in the general expression with the a, b, c and d? Here you need to look closely at the top right and bottom left terms to see the minus signs. At a glance they can look like a continuation of the division line! This is a facet of the software I used to generate the expression - I've missed them myself in the past!
You know anon - picking up possible errors is fine but it is important to throw in a thank you as well.
Alan did a lot of work on your behalf!
Might be a different Anonymous Melody. That's the problem with Anonymous - he/she is a multi-headed beast!
Even if it is a different anon they can still acknowledge the work that you have done.
Because the message started with the words "Hi Alan,..." I took it as a friendly pointer to a possible error (let's face it, I make enough mistakes!).