SOLUTION: I need to figure out the numerical value of variables a,b,and c. 3a-5b+5c=21

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Question 315235: I need to figure out the numerical value of variables a,b,and c. 3a-5b+5c=21
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
You can get a value of each variable in terms of the constants and other variables.
As an example,
3a-5b%2B5c=21
3a=21%2B5b-5c
a=%2821%2B5b-5c%29%2F3
From what you write, I'm assuming that's not what you're looking for.
To get a numerical value for 3 variables, you need 3 independent equations that describe the relationships between the three variables.