document.write( "Question 56757: Didn't know exactly where to put this problem. It's a worksheet and in the text book for the certain type of problem it's under Investment Problems.\r
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\n" ); document.write( "\n" ); document.write( "An investment of $1500 paid interest of $45 during a certain period. How much interest would an investment of $1200 invested at the same rate for the same length of time pay?
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Algebra.Com's Answer #38660 by tutorcecilia(2152)\"\" \"About 
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Since two items are being compared, set it up as a ratio problem:
\n" ); document.write( "a/b=c/d and solve for the missing variable:
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\n" ); document.write( "$1500/$45=$1200/x
\n" ); document.write( "1500x=(45)(1200) [Cross-miltiply]
\n" ); document.write( "1500x=54,000
\n" ); document.write( "x=54,000/1500
\n" ); document.write( "x=$36
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\n" ); document.write( "Check by plugging (x=36) back into the original equation.
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