Because we have two values of x, we can set the two expressions equal to each-other.
x^2 + 6x + 9 = x + 3
Subtract x and 3 from both sides.
x^2 + 5x + 6 = 0
Now that we have all terms on one side, we can find the values of x.
Using the AC method, we can simplify this equation to (x + 2)(x + 3)
The solutions to the system of equations presented are:
x = -2, x = -3.