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Hi I have these equations that I wish to know how to reach the variables

for example

${\begin{cases}A=6\\D=A-C\\B=2C\end{cases}}$

All I have is the value of $A$, and $A$ changes from time to time so its not always $6$ it can be $8$, $20$ or anything else.

How can I get the values of each $B$, $C$, and $D$?

Note that, all numbers have to be integer, no floats.

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    Your system of equations is underdetermined. Even if restricting to integers, there can be more than one solution. $(A,B,C,D)=(6,12,6,0)$ is a solution, but so is $(A,B,C,D)=(6,8,4,2)$. You have to provide us a bit more background. Especially about the time dependency, which probably contains extra information.2011-01-11

2 Answers 2