If `2[3 4 5x]+[1y0 1]=[7 0 10 5],` find `(x-y)dot`

Explanation

To solve the equation \( 2[3 \quad 4 \quad 5x] + [1y \quad 0 \quad 1] = [7 \quad 0 \quad 10 \quad 5] \), we will follow these steps:

### Step 1: Multiply the first matrix by 2
We start by multiplying each element of the matrix \( [3 \quad 4 \quad 5x] \) by 2:

\[ 2[3 \quad 4 \quad 5x] = [2 \times 3 \quad 2 \times 4 \quad 2 \times 5x] = [6 \quad 8 \quad 10x] \]
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