Question 1158915

Rosa invested some of her $15,000 in bonds that made a 6% profit and the rest in bonds that made a 10% profit.  If the profit on the 10% bonds was $1,000 more than the profit on the 6% bonds, how much did Rosa invest in the 6% bonds?
<pre>Let amount invested in the 6%-bonds, be S 
Then amount invested in 10%-bonds is 15,000 - S
Then we get the following EARNINGS equation: .06S = .1(15,000 - S) - 1,000
.06S = 1,500 - .1S - 1,000
.06S + .1S = 1,500 - 1,000
.16S = 500
Amount invested in the 6%-bonds, or {{{highlight_green(matrix(1,5, S, "=", 500/.16, "=", "$3,125"))}}}