Draw the graphs of the equations `x-y=1\ a n d\ 2x+y=8` . Shade the area bounded by these two lines and y-axis. Also, determine this area.

Explanation

To solve the problem, we need to follow these steps:

### Step 1: Write the equations
We have two equations:
1. \( x - y = 1 \)
2. \( 2x + y = 8 \)

### Step 2: Convert the equations to slope-intercept form
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