Plug in the values. The x value is 3, and the y value is 6. Act on that. The equation y = 3x - 3 changes to 6 = 3(3) - 3. Do those numbers work? Solve it.
6 = 3(3) - 3 --> 6 = 9 - 3 --> 6 = 6 ... So yes, (3, 6) is a solution for y = 3x - 3.
Now let's move on to the next equation. If we plug in the same x and y values, then y = 2x + 2 will change to 6 = 2(3) + 2. Now comes the solving ...
6 = 2(3) + 2 --> 6 = 6 + 2 --> 6 > 8 ... So the coordinates do not work for the second equation since the two answers are not equal.
