document.write( "Question 214049: Joeseph Smith is the manager of a trust. He invested 30% of a clients cash in gov't bonds that earn 6.5% annual simple interest, 30% in utility stocks that earn 7% annual simple interest, and the remainder in an account that earns 8% annual simple interest. The total annual interest earned from the investments was $5437.50. Find the total amount invested. \n" ); document.write( "
Algebra.Com's Answer #162228 by checkley77(12844)\"\" \"About 
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.3x*.065+.3x*.07+.4x*.08=5,437.50
\n" ); document.write( ".0195x+.021x+.032x=5,437.50
\n" ); document.write( ".0725x=5,437.50
\n" ); document.write( "x=5,437.50/.0725
\n" ); document.write( "x=75,000 is the amount invested.
\n" ); document.write( "Proof:
\n" ); document.write( ".3*75,000*.065+.3*75,000*.07+.4*75,000*.08=5,437.50
\n" ); document.write( "1,462.5+1,575+2,400=5,437.5
\n" ); document.write( "5,437.5=5,437.5
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