Solve ：`y-7=5`.

Explanation

To solve the equation \( y - 7 = 5 \), we will follow these steps:

### Step 1: Write down the equation
We start with the equation:
\[ y - 7 = 5 \]

### Step 2: Isolate \( y \)
To isolate \( y \), we need to eliminate the \(-7\) from the left side. We can do this by adding \( 7 \) to both sides of the equation. This step is based on the principle that whatever we do to one side of the equation, we must do to the other side as well.
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