Given the matrices A and B as `A=[(1,-1),(4,-1)]` and `B=[(1,-1),(2,-2)]`. The two matrices X and Y are such that `XA=B` and `AY=B`, then find the matrix `3(X+Y)`

Explanation

To solve the problem step by step, we will follow the process outlined in the video transcript.

### Step 1: Define the matrices A and B
Given:
\[ A = \begin{pmatrix} 1 & -1 \\ 4 & -1 \end{pmatrix} \]
\[ B = \begin{pmatrix} 1 & -1 \\ 2 & -2 \end{pmatrix} \]

### Step 2: Calculate the determinant of matrix A
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