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I've got this question:

Find the variable (hidden) in this expression:

$$3X =\begin{bmatrix}0&3\\6&9\end{bmatrix}$$

I've written down that $X$ equals to

$$X=\begin{bmatrix}0&1\\2&3\end{bmatrix}$$

is my answer wrong or right?

I'm not sure if this is the right place, but if it isn't , what is my mistake?

thanks

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I have no idea what this means? –  copper.hat Nov 10 '12 at 6:09
    
@copper.hat - You're right, the description was unclear. I edited the question. I'm sorry . –  Billie Nov 10 '12 at 6:15
    
Looks good to me... –  copper.hat Nov 10 '12 at 6:16
    
@joriki "hidden" mean X - not explicit number. –  Billie Nov 10 '12 at 6:18
    
@joriki - "variable" \ "hidden" = not explicit number. a "sign" (usually X \ Y \ Z etc) that I should find out its value. –  Billie Nov 10 '12 at 6:21

1 Answer 1

up vote 0 down vote accepted

Your answer is perfect, no mistake at all. Multiplying/dividing matrices by numbers is so easy: we multiply/divide all the elements in the matrix by that number.

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Thank you so much! –  Billie Nov 14 '12 at 20:36

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