# How do I find the values of b and y?[A][b = [3 y] 4]

How do I find the values of b and y?
[A][b = [3
y] 4]

## Answers and Replies

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Dick
Science Advisor
Homework Helper
You are going to format that better, aren't you?

[A][b y]=[3 4]
y is below b
4 is below 3

Dick
Science Advisor
Homework Helper
And what is A?

HallsofIvy
Science Advisor
Homework Helper
That's a lot like asking: "What is Ax= 4?" without telling us what A is. The only possible answer is "x= 4/A" or "X= A-14".

The only possible answer to your question is
$$\left[\begin{array}{c} b \\ y \end{array}\right]= A^{-1}\left[\begin{array}{c} 3 \\ 4\end{array}\right]$$
until we know what "A" is.

Of course, if the problem really was what you said, that may be the correct answer!

thats what i thought. it was a question in an exam i recently had.