SOLUTION: Andy gets 3x what Carla gets, Brian gets half of what Donna gets. Brian and Carla gets the same. How many does Andy get?

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Question 1025305: Andy gets 3x what Carla gets, Brian gets half of what Donna gets. Brian and Carla gets the same. How many does Andy get?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=3C
B=%281%2F2%29D
B=C
You have 4 unknowns but only three equations.
You need an additional independent equation to solve for each variable.
Else you can solve for each variable in terms of the others.
Please clarify and repost.