document.write( "Question 1103376: A carpenter purchased 70 ft of redwood and 90 ft of pine for a total cost of $343. A second purchase, at the same prices, included 90 ft of redwood and 70 ft of pine for a total cost of $377. Find the cost per foot of redwood and of pine. \n" ); document.write( "
Algebra.Com's Answer #718114 by richwmiller(17219)\"\" \"About 
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70r+90p=343\r
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