document.write( "Question 815636: A man invests a total of $9,493in two savings accounts. One account yields 9% simple interest and the other 10% simple interest. He earned a total of $930.80interest for the year. How much was invested in the 9% account?
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Algebra.Com's Answer #491142 by mananth(16946)![]() ![]() You can put this solution on YOUR website! Part I 9.00% per annum ------------- Amount invested =x \n" ); document.write( "Part II 10.00% per annum ------------ Amount invested = y \n" ); document.write( " 9493 \n" ); document.write( "Interest----- 930.80 \n" ); document.write( " \n" ); document.write( "Part I 9.00% per annum ---x \n" ); document.write( "Part II 10.00% per annum ---y \n" ); document.write( "Total investment \n" ); document.write( "x + 1 y= 9493 -------------1 \n" ); document.write( "Interest on both investments \n" ); document.write( "9.00% x + 10.00% y= 930.8 \n" ); document.write( "Multiply by 100 \n" ); document.write( "9 x + 10 y= 93080.00 --------2 \n" ); document.write( "Multiply (1) by -9 \n" ); document.write( "we get \n" ); document.write( "-9 x -9 y= -85437.00 \n" ); document.write( "Add this to (2) \n" ); document.write( "0 x 1 y= 7643 \n" ); document.write( "divide by 1 \n" ); document.write( " y = 7643 \n" ); document.write( "Part I 9.00% $ 1850 \n" ); document.write( "Part II 10.00% $ 7643 \n" ); document.write( " \n" ); document.write( "CHECK \n" ); document.write( "1850 --------- 9.00% ------- 166.50 \n" ); document.write( "7643 ------------- 10.00% ------- 764.30 \n" ); document.write( "Total -------------------- 930.80 \n" ); document.write( " \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " \n" ); document.write( " |