Problem: Five times A's money added to B's money is more than $51.00. Three times A's money minus B's money is $21.00. If a represents A 's money in dollars and b​ represents B 's money in dollars, then:
Answer Choices:
A. a >9, b >6
B. a >9, b <6
C. a>9, b=6
D. a >9, but we can put no bounds on b​
E. 2a=3 b
Solution:
5a+b>51
3a−b=21
therefore 8a>72,a>9,3a>27
Since b=3a−21,b>6