document.write( "Question 904396: Mrs.Santos invests P21,000 at 8% interest rate.How much more must he invest at 9 1/2% interest to have an annual income of 9% of his total investments? (answer is P42,000 show your solution) \n" ); document.write( "
Algebra.Com's Answer #548672 by mananth(16946)\"\" \"About 
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Mrs.Santos invests P21,000 at 8% interest rate.\r
\n" ); document.write( "\n" ); document.write( "let her invest x at 9 1/2% interest \r
\n" ); document.write( "\n" ); document.write( "annual income of 9% of his total investments \r
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\n" ); document.write( "\n" ); document.write( "total investment =(x+21000)\r
\n" ); document.write( "\n" ); document.write( "8%*21000+9.5%x= 9%(x+21000)\r
\n" ); document.write( "\n" ); document.write( "multiply by 100\r
\n" ); document.write( "\n" ); document.write( "8*21000 +9.5x = 9x+189000\r
\n" ); document.write( "\n" ); document.write( "9.5x-9x= 189000-168000\r
\n" ); document.write( "\n" ); document.write( "0.5x=21000\r
\n" ); document.write( "\n" ); document.write( "multiply by 2
\n" ); document.write( "x=42000\r
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\n" ); document.write( "\n" ); document.write( "(answer is P42,000 show your solution)
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