Question

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Matrix multiplication question, PLEASE HELP

Answer 1

Find x

Answer 2

My calculator says error.

Answer 3

\[\left[\begin{matrix}4x+1*2 & 4*8+1*7 \\ 3x+2*2 & 3*8+2*7\end{matrix}\right]=\left[\begin{matrix} 22 & 39 \\ 19 & 38\end{matrix}\right]\]
\[\left[\begin{matrix}4x+2 & 32+7 \\ 3x+4 & 24+14\end{matrix}\right]=\left[\begin{matrix}22 & 39 \\ 19 & 38\end{matrix}\right]\]
\[\left[\begin{matrix}4x+2 & 39 \\ 3x+4 & 38\end{matrix}\right]=\left[\begin{matrix}22 & 39 \\ 19 & 38\end{matrix}\right]\]
4x+2=22
4x=22-2=20
x=20/4=5

Answer 4

Are you trying to make each side even? when its in the matrix?

Answer 5

or box, I don't know what to call it..

Answer 6

when two matrices are equal, then corresponding elements are equal.
4x+2=22
3x+4=19
39=39
38=38

Answer 7

thank you!