You divide everything by 2.
Your answer is
Y=1/2 + 3/2
Answer:
I'm not 100% sure on this but I think it would be C- 8.1
Step-by-step explanation:
The answer is 3
Multiply 6 by 3 to get the total amount of money for the books then minus the answer 18 which you get from 6 x 3 = 18
Then minus 18 from 21 to get $3
21 - 18 = 3