Question 1100010
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<pre>
0.06*x + 0.03(2300-x) = 90.

6x + 3*(2300-x) = 100*90

6x + 6900 - 3x = 9000

3x = 9000 - 69000 = 2100  ====>  x = {{{2100/3}}} = 700.


<U>Answer</U>.  $700 at 6%  and  $2300 - $700 = $1600 at 3%.


<U>Check</U>.   0.06*700 + 0.03*1600 = 90.   ! Correct !
</pre>

Solved.


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&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/coordinate/lessons/Using-systems-of-equations-to-solve-problems-on-investment.lesson>Using systems of equations to solve problems on investment</A>

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