Question

A person has ​$ to invest. Part of the money is to be placed in a certificate of deposit paying ​%, per year. The rest is to be placed in corporate bonds paying ​%, per year. If he wishes to obtain an overall return of ​% per​ year, how much should be placed in each​ investment?
If there are $z invested, with $x at a% and the rest at b%, and the final result is c%, then
ax + b(z-x) = cz

Now you really should supply some numbers. Just sayin'

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