the math - algebra is correct except for one thing:
you can never divide by zero.
In this example, x=-1 or 0
hence
you can't 'cancel' things out by dividing both sides by either (x + 1) or x
because you would be dividing by zero.
but I do thank you, I was wondering if and when I would ever be able to work an equation like that into the response. but I could have modified the numbers to be anything 1 = 8, 7 = 3 or whatever.
now if I was an actuary then of course it would have been
2 + 2 = "what do you want the answer to be"