document.write( "Question 1024352: Last year Sarah had $20,000 to invest she invested some an account that paid 9% simple interest rate per year and she invested the rest and account that pay 10% simple interest rate per year after one year she received a total of $1,840 how much did she invest in each account \n" ); document.write( "

Algebra.Com's Answer #639796 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = amount she invested at 9%
\n" ); document.write( " $\"+20000+-+x+\"$ = amount she invested at 10%
\n" ); document.write( "------------------
\n" ); document.write( " $\"+.09x+%2B+.1%2A%28+20000+-+x+%29+=+1840+\"$
\n" ); document.write( " $\"+.09x+%2B+2000+-+.1x+=+1840+%7D%7D%7C%7D%0D%0A%7B%7B%7B+.01x+=+2000+-+1840+\"$
\n" ); document.write( " $\"+.01x+=+160+\"$
\n" ); document.write( " $\"+x+=+16000+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+20000+-+x+=+20000+-+16000+\"$
\n" ); document.write( " $\"+20000+-+x+=+4000+\"$
\n" ); document.write( "She invested $16,000 @ 9%
\n" ); document.write( "She invested $4,000 @ 10%
\n" ); document.write( "------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+.09x+%2B+.1%2A%28+20000+-+x+%29+=+1840+\"$
\n" ); document.write( " $\"+.09%2A16000+%2B+.1%2A4000+=+1840+\"$
\n" ); document.write( " $\"+1440+%2B+400+=+1840+\"$
\n" ); document.write( " $\"+1840+=+1840+\"$
\n" ); document.write( "OK \n" ); document.write( "

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