We are given the equation:

$x + y = 3$

If $x = 2$, substitute this value into the equation:

$2 + y = 3$

Solving for $y$:

$y = 3 - 2$

$y = 1$

Thus, when $x = 2$, $y = 1$.

Would you like a detailed breakdown or have any questions?

Here are five related questions to explore:

1. What happens to $y$ if $x = 0$ in the same equation?
2. Can you graph the equation $x + y = 3$?
3. How do you express $y$ in terms of $x$ (solve for $y$)?
4. What is the slope and y-intercept of the equation $x + y = 3$?
5. How would you solve for $x$ if $y$ were given instead?

Tip:

A linear equation like $x + y = 3$ represents a straight line in a coordinate plane. The intercepts can be found by setting one variable to zero and solving for the other. 🚀