# A man invested some amount at 6% interest rate and some amount at 9% interest rate. If he put Php12,000 more in the second investment than in the first investment and his annual income from both investments is Php4,830 how much did he invest at each rate?

##### 1 Answer

Jun 19, 2016

The principle sums were Php25000 and Php37000

#### Explanation:

Let the first principle sum be

Let the second principle sum be

Then we have:

As the annual income is fixed then the interest rate can not be compound. Otherwise the income each year would increase.

But

So by substitution we have: