Question 1174543
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<pre>

Account A   x  dollars

Account B   (x-4000)  dollars.

Account C   2x  dollars.



The total interest equation

    0.03x + 0.04*(x-4000) + 0.05*(2x) = 1540   dollars.



Simplify and solve.


I leave it to you.
</pre>


The lesson to learn from my post is THIS:


<H3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;You don't need use 3 unknown.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Solve the problem using ONE UNKNOWN, ONLY</H3>