I think it is 21 and 50. The only common factor they have is 1.
All the others are divisible by 1 & 3.
Answer:3rd choice
Step-by-step explanation:
eliminate choices with a=2+b and o=3+b because those say two more apples than bananas, and 3 more oranges than bananas.
eliminate choice with b=2a because that says twice as many bananas as apples.
Answer: C
<u>Step-by-step explanation:</u>

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Answer:
a=9
divide 81 by 9 on both sides and you get 9.
Step-by-step explanation: