document.write( "Question 1133346: Two investments totaling $57,500 produce an annual income of $4245 . One investment yields 8% per year, while the other yields 7% per year. How much is invested at each rate?
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Algebra.Com's Answer #750587 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "7% of x plus 8% of (57500 -x) is equal to the total annual income of $4245.\r\n" );
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document.write( "It is your equation\r\n" );
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document.write( "   0.07*x + 0.08*(57500-x) = 4245\r\n" );
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document.write( "Simplify and solve for x:\r\n" );
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document.write( "    x =  = one click in Excel = 35500.\r\n" );
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document.write( "Answer.  $35500 was invested at 7% and the rest,  57500 - 35500 = 22000 dollars was invested at 8%.\r\n" );
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document.write( "CHECK.   0.07*35500 + 0.08*22000 = 4245 dollars.   ! Correct !\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is a standard and typical problem on investments.\r
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\n" ); document.write( "\n" ); document.write( "If you need more details, or if you want to see other similar problems solved by different methods, look into the lesson \r
\n" ); document.write( "\n" ); document.write( " - Using systems of equations to solve problems on investment\r
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\n" ); document.write( "\n" ); document.write( "You will find there different approaches (using one equation or a system of two equations in two unknowns), as well as
\n" ); document.write( "different methods of solution to the equations (Substitution, Elimination).\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( " - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lesson is the part of this online textbook under the topic \"Systems of two linear equations in two unknowns\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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