The answer is 7.
2. The answer is 19.
3. The answer is 5/2.
2. The answer is 47
3. The answer is 20.
4. The answer is 4 and 5.
The answer is ab > cd > c/d + ac > cd + a/b > a + b > ab.
The answer is y = 3x - 7.
The answer is (0,3) and (4,4).
The answer is (-20,15), (0,4), and (-10,-12).
The answer is (3,4) and (-5,8).
The answer is (12,7) and (-10,-12).
