document.write( "Question 1128531: adrienne invested a total amount of 100,000 php in banks A and B with an interest rate of 5% and 8% respectively. if the income from bank B is 800 more than the twice the income from bank A, how much was invested in bank B? \n" ); document.write( "
Algebra.Com's Answer #745041 by ikleyn(52786)\"\" \"About 
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document.write( "x = 5% amount\r\n" );
document.write( "100000-x = 8% amount\r\n" );
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document.write( "0.08*(100000-x) = 0.05*x*2+800,     since it is given\r\n" );
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document.write( "8000 - 800 = 0.08x + 0.10x\r\n" );
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document.write( "0.18x = 7200\r\n" );
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document.write( "x = 7200/0.18 = 40000  was invested at 5%.\r\n" );
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document.write( "The rest, i.e. 100000-40000 = 60000 was invested at 8%.\r\n" );
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document.write( "ANSWER.  Php 40000 was invested at 5%;  Php 60000 was invested at 8%.\r\n" );
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document.write( "Check.   0.08*60000 - 2*(0.05*40000) = 800 Php   ! 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
\n" ); document.write( "\n" ); document.write( "in this site.\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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