Question

Nilai ke tiga bilangan itu berturut turut adalah

Answer 1

A + b + c = 40

(a+b)/c = 5/3
3a + 3b = 5c
a + b = (5/3)c

a + b + c = 40
(5/3)c + c = 40
5c + 3c = 120
8c = 120
c = 15

a - b = 5 maka a = b + 5

a + b = (5/3)c
(b + 5) + b = (5/3)(15)
2b + 5 = 25
2b = 20
b = 10

a = b + 5 = 10 + 5 = 15