Question

I need help with matrix equations.

Answer 1

`\left[\begin{array}{ccc}-48&-60\\44&30\end{array}\right]`

Explanation:

0.5 X + 3A = B implies

X = 2(B-3A)

3A simply means multiplying each cell by 3

`3A = \left[\begin{array}{ccc}12&24\\-33&-3\end{array}\right]`

B-3A is a corresponding cell by cell subtraction

`B-3A = \left[\begin{array}{ccc}-24&-30\\22&15\end{array}\right]`

Finally multiply that by 2, result is at the top.