Question 1205761
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<pre>

Let x be invested in treasury notes.

Then (5000-x) is invested in bonds.


Write the total annual interest equation

    0.08x + 0.1*(5000-x) = 480.


Simplify and find x

    0.08x + 500 - 0.1x = 480

    0.08x - 0.1x       = 480 - 500

        -0.02x         =    -20

             x         =   {{{(-20)/(-0.02)}}} = 1000.


<U>ANSWER</U>.  1000 is invested in treasury notes.


<U>CHECK</U>.   0.08*1000 + 0.1*(5000-1000) = 480, total annual interest.   ! correct !
</pre>

Solved.


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It is a standard and typical problem on investments.


If you want to see many other similar solved problems, &nbsp;look into the lesson 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/equations/Typical-investment-problems.lesson>Typical investment problems</A>

in this site.