document.write( "Question 810744: $5400 is invested,part of it at 12% and part of it at 7%. For a certain year, the total yield is $528.00. How much was invested at each rate?\r
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Algebra.Com's Answer #488381 by richwmiller(17219)\"\" \"About 
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a+b=5400,
\n" ); document.write( ".12a+.07b=528
\n" ); document.write( "a=3000., b=2400.
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