document.write( "Question 806673: I NEED HELP SETTING UP THIS WORD PROBLEM: Tracy has $20,000 to invest. As her financial planner, you recommend that she diversify into three investments: Treasury bill that yield 5% simple interest, treasury bonds that yield 7% simple interest, and corporate bonds that yield 10% simple interest. Tracy wishes to earn $1390 per year in income. She also wants her investment in Treasury bills to be $3000 more than her investment in corporate bonds. How much money should she place in each investment?
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Algebra.Com's Answer #485958 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+a+\" = amount invested @ 5%
\n" ); document.write( "Let \"+b+\" = amount invested @ 7%
\n" ); document.write( "Let \"+c+\" = amount invested @ 10%
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\n" ); document.write( "(1) \"+a+%2B+b+%2B+c+=+20000+\"
\n" ); document.write( "(2) \"+.05a+%2B+.07b+%2B+.1c+=+1390+\"
\n" ); document.write( "(3) \"+a+=+c+%2B+3000+\"
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\n" ); document.write( "You have 3 equations and 3 unknowns,
\n" ); document.write( "so it is solvable
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