Hello everyone

I am studying linear algebra and these problems came across:

1

Solve all values on a in the equation system

2

If a ≠ 1 solve the equation system with n equations and unknown variables.

What happens if ?

Ugh, I think i'll just scan this problem and upload it.

3

Solve for all values on a and b in the equation system.

Ok, what can we do?

Problem 1

We need to remove the lower-left a, so we got to multiply the first equation with a.

Now the a will go away but what happens with the second variable?

Here's where it stops for me. We haven't really gone into things like this. I guess the result might be this:

Second variable:

Sum:

I think I won't toch problem 2 & 3 with a stick before getting a grasp of 1.

Thanks for all replies.