document.write( "Question 78083: there are 850 Douglas fir and ponderosa pine trees in a section of forest bought by Sawz Logging Co. The company paid an average of $300 for each Douglas fir and $224 for each ponderosa pine. If the company paid $217,500 for the trees, how many of each kind did the company buy? \n" ); document.write( "
Algebra.Com's Answer #55982 by checkley75(3666)\"\" \"About 
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D+P=850 OR D=850-P
\n" ); document.write( "300D+225P=217,500 NOW SUBSTITUTE (850-P) FOR D AND SOLVE FOR P
\n" ); document.write( "300(850-P)+225P=217,500
\n" ); document.write( "255,000-300P+225P=217,500
\n" ); document.write( "-75P=217,500-255,500
\n" ); document.write( "-75P=-37,500
\n" ); document.write( "P=-37,500/-75
\n" ); document.write( "P=500 PONDEROSA PINES WERE BOUGHT.
\n" ); document.write( "D+500=850
\n" ); document.write( "D=850-500
\n" ); document.write( "D=350 DOUGLAS FIRS WERE BOUGHT.
\n" ); document.write( "PROOF
\n" ); document.write( "300*350+225*500=217,500
\n" ); document.write( "105,000+112,500=217,500
\n" ); document.write( "217,500=217,500
\n" ); document.write( "
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