SOLUTION: An investment of $8000 earned a net gain of $220 in one year. Part of the investment was in bonds and earned income at a rate of 7 %. The rest of the investment was in stocks and l

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: An investment of $8000 earned a net gain of $220 in one year. Part of the investment was in bonds and earned income at a rate of 7 %. The rest of the investment was in stocks and l      Log On

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Question 167197: An investment of $8000 earned a net gain of $220 in one year. Part of the investment was in bonds and earned income at a rate of 7 %. The rest of the investment was in stocks and lost money at the rate of 10%. How much was invested in bonds?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
-.10x+.07(8000-x)=220
-.10x+560-.07x=220
-.17x=220-560
-.17x=-340
x=-340/-.17
x=$2,000 invested @ 10%
8,000-2,000=6,000 invested @ 7%.
Proof:
-.10*2,000+.07*6,000=220
-200+420=220
220=220