Question 1176115
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ TD\ +\ RB\ =\ 5000]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 0.06(TD)\ +\ 0.07(RB)\ =\ 230]


Solve the 2X2 linear system to obtain the original amounts invested.  Given the simplicity of the first equation, my choice would be the Substitution method.  Find an expression for RB in terms of TD.

																
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
*[illustration darwinfish.jpg]

From <https://www.algebra.com/cgi-bin/upload-illustration.mpl> 
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