Question 30114
The equAtion is: .08I=2/3x.072(24000-I) I being the amount invested @ 8%.

.08I=.048(24,000-I)

.08I=1,152-.048I

.128I=1,152

I=1,152/.128

I=9,000 or the amount invested @ 8% and the amount invested @7.2% is 15,000.

Interest from the 8% investment is $720 while the interest from the $15,000 investment is $1,080. $720 is 2/3 of $1080.