Question 760456

a = shortest side
3 + 3a = side b
24 + a = side c

87 = a + 3 + 3a + 24 + a
87 = 5a + 27
87 - 27 = 5a
60 = 5a
60 / 5 = a
a = 12

b = 3 + 3(12)
b = 39

c = 24 + 12
c = 36