Answer:
Step-by-step explanation:
a + b + c = 109,000
b = 2a
c = a - 15,000
now its just a matter of subbing
a + 2a + a - 15,000 = 109,000
4a - 15,000 = 109,000
4a = 109,000 + 15,000
4a = 124,000
a = 124,000/4
a = 31,000 <==== candidate A received 31,000 votes
b = 2a
b = 2(31,000)
b = 62,000......candidate B received 62,000 votes
c = a - 15,000
c = 31,000 - 15,000
c = 16,000....candidate C received 16,000 votes