document.write( "Question 806038: Ann has $7000.00 invested in two accounts, part at 7% simple interest and part at 5.25% simple interest for a period of 1 year. How much did she invest at each rate if each account earned the same interest? \n" ); document.write( "
Algebra.Com's Answer #485684 by mananth(16946)\"\" \"About 
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Part I -----------x--------------7%
\n" ); document.write( "Part II----------y---------------5.25%\r
\n" ); document.write( "\n" ); document.write( "x+y=7000\r
\n" ); document.write( "\n" ); document.write( "7%x=5.25%y
\n" ); document.write( "7x=5.25y
\n" ); document.write( "7x-5.25y=0\r
\n" ); document.write( "\n" ); document.write( "1 x + 1 y = 7000 .............1
\n" ); document.write( "Total value
\n" ); document.write( "7 x -5 1/4 y = 0 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by 5 1/4
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "5 1/4 x 5 1/4 y = 36750
\n" ); document.write( "7 x -5 1/4 y = 0
\n" ); document.write( "Add the two equations
\n" ); document.write( "12 1/4 x = 36750
\n" ); document.write( "/ 12 1/4
\n" ); document.write( "x = 3000
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "1 x + 1 y = 7000
\n" ); document.write( "3000 + y = 7000
\n" ); document.write( " y = 7000 -3000
\n" ); document.write( " y = 4000
\n" ); document.write( " y = 4000
\n" ); document.write( " \n" ); document.write( "
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