Simplify: `[5-3x+2y-(2x-y)]-(3x-7y+9)`
`Giventhat`

Explanation

To simplify the expression `[5 - 3x + 2y - (2x - y)] - (3x - 7y + 9)`, we will follow these steps:

### Step 1: Distribute the negative sign
First, we need to distribute the negative sign across the terms in the parentheses. This means we will change the signs of the terms inside the parentheses.

\[ 5 - 3x + 2y - (2x - y) = 5 - 3x + 2y - 2x + y \]
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