SOLUTION: Melanie invests a total of $17,500 in two accounts. The first account earned a rate of return of 13% (after a year). However, the second account suffered a 6% loss in the same time

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: Melanie invests a total of $17,500 in two accounts. The first account earned a rate of return of 13% (after a year). However, the second account suffered a 6% loss in the same time      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 670260: Melanie invests a total of $17,500 in two accounts. The first account earned a rate of return of 13% (after a year). However, the second account suffered a 6% loss in the same time period. At the end of one year, the total amount of money gained was $1,800.00. How much was invested into each account?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +a+ = amount invested in the 1st account
Let +b+ = amount invested in the 2nd account
+.13a+ = gain from 1st account
+.06b+ = loss from 2nd account
-------------
given:
(1) +a+%2B+b+=+17500+
(2) +.13a+-+.06b+=+1800+
------------------------
(2) +13a+-+6b+=+180000+
Multiply both sides of (1) by +6+
and add the equations
(2) +13a+-+6b+=+180000+
(1) +6a+%2B+6b+=+105000+
+19a+=+285000+
+a+=+15000+
and, since
(1) +a+%2B+b+=+17500+
(1) +15000+%2B+b+=+17500+
(1) +b+=+2500+
$15,000 was invested in the 1st account
$2,500 was invested in the 2nd account
check:
(2) +.13a+-+.06b+=+1800+
(2) +.13%2A15000+-+.06%2A2500+=+1800+
(2) +1950+-+150+=+1800+
(2) +1800+=+1800+
OK