Let the relation \( R \) be defined on the set of real numbers by \( R = \{(x, y) | x = 2y + 3\} \). Find the inverse of the relation \( R \).

Step 1 ：Write the equation for the relation in the form \( y = f(x) \), which gives \( y = \frac{x - 3}{2} \).

Step 2 ：The inverse of a relation is found by exchanging \( x \) and \( y \). So, replacing \( x \) with \( y \) and \( y \) with \( x \), we get \( x = \frac{y - 3}{2} \).

Step 3 ：Finally, write the equation for the inverse relation in the form \( y = g(x) \), which gives \( y = 2x + 3 \).