Answer:
28
Step-by-step explanation:
(4.)
Let x = Mylyn's age
Let y = Rhandale's age
x + y ≤ 67
x = y - 11
(y - 11) + y ≤ 67
2y - 11 ≤ 67
2y ≤ 67 + 11
2y ≤ 78
y ≤ 39
39 - 11
= 28
