...If x is even less than 0, then since x < 0, x + 3 < 0 + 3 (since x started out to be less than 0, three greater than x is going to be less
than 3 greater than 0, or x + 3 < 0 + 3 = 3). If x + 3 < 3, then it cannot be greater than 4, and therefore, any number less ... (read more)