Ms. garza invested $50,000 in three different accounts. she invested three times as
much money in an account that paid 8% interest than an account that paid 10% interest.
the third account earned 12% interest. if she earned a total of $5160 in interest in a year,
how much did she invest in each account?

The amount invested in the account that paid 8%  was $18,000

The amount invested in the account that paid 10%  was $6,000

The amount invested in the account that paid 12%  was $26,000

Step-by-step explanation:

Let

3x -----> the amount invested in the account that paid 8%

x -----> the amount invested in the account that paid 10%

$50,000-4x ----> the amount invested in the account that paid 12%

in this problem we have

we know that

Solve for x

therefore

The amount invested in the account that paid 8%  was $18,000

The amount invested in the account that paid 10%  was $6,000

The amount invested in the account that paid 12%  was $26,000