16/4 + 12 = 4 + 24/2 would be the symbol to make the statement true because when we solve the equation, we see since both sides are equal, there are infinitely many answers since if we solve both expressions individually, they both have the same answer, which makes them EQUAL.
For the first one, 4 + 12 = 16 and 16/16 = 1 and for the second one, 24/2 = 12, and 12 + 4 = 16, so since both equal 16, they cancel each other out.
