Question 824135
A U B means "either A or B" in a sense, which basically means that x is either less than 5 OR x ≤ 7


Put together, this means that x &#8804; 7 because x < 5 is part of x &#8804; 7


Which is why the answer is <font color="red">{x | x &#8804; 7}</font>