document.write( "Question 1207481: Linda Smaoke invests a total of $10,000 in two savings accounts. One account pays 6% ​interest, and the​ other,7%. Find the amount placed in each account if the accounts receive a total of $660 in interest after 1 year. \n" ); document.write( "
Algebra.Com's Answer #845376 by ikleyn(52786)\"\" \"About 
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document.write( "Let the 7% investment be x dollars;\r\n" );
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document.write( "then the 6% investment is (10000-x) dollars.\r\n" );
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document.write( "Partial interests from separate accounts are 0.07x and 0.06*(10000-x) dollars, respectively.\r\n" );
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document.write( "The total annual interest equation is\r\n" );
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document.write( "    0.07x + 0.06*(10000-x) = 660  dollars.\r\n" );
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document.write( "Simplify this equation and find x\r\n" );
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document.write( "    0.07x + 600 - 0.06x = 660\r\n" );
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document.write( "    0.07x - 0.06x = 660 - 600\r\n" );
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document.write( "        0.01x     =    60\r\n" );
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document.write( "            x     =    60/0.01 = 6000  dollars.\r\n" );
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document.write( "So, the 7% investment is $6000;  the 6% investment is the rest,  $10000 - $6000 = $4000.\r\n" );
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document.write( "        Thus you get the answer.\r\n" );
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document.write( "CHECK.  0.07*6000 + 0.06*4000 = 420 + 240 = 660  dollars.  ! precisely correct !\r\n" );
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\n" ); document.write( "\n" ); document.write( "The other person made an arithmetic error on the way and did not fix it.\r
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\n" ); document.write( "\n" ); document.write( "Let this example teaches you on how important is to make a full-size check at the end.\r
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\n" ); document.write( "\n" ); document.write( "        Without such full-size check the solution is not complete !\r
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