x+y=3

Certainly, let's solve the equation step by step: The equation you have is: x + y = 3 Step 1: Isolate one of the variables. You can choose either x or y. Let's solve for x in terms of y: x = 3 - y Step 2: Now, you have an expression for x in terms of y. You can use this expression to find specific values of x when you have values for y or vice versa. For example, if you have a value for y, you can substitute it into the equation to find the corresponding x value. Similarly, if you have a value for x, you can find the corresponding y value by rearranging the equation. That's how you solve the equation x + y = 3 step by step. It represents a line in the xy-plane, and any point (x, y) that satisfies this equation will lie on that line.