document.write( "Question 187480: Can you please help me with this problem and how you got to the answer. \r
\n" ); document.write( "\n" ); document.write( "A carpenter goes to a hardware store to buy a specific number of pounds of nails for his business. The first store he enters sells his favorite-sized nails at nine cents per pound. At this price, the carpenter realizes that he would be short $7.15 if he tried to buy the nails. The carpenter goes to a competing hardware store and finds the nails sell for six cents per pound. He realizes that after paying for the nails, he would have $2.45 left over. How many pounds of nails is he trying to buy?\r
\n" ); document.write( "\n" ); document.write( "Thanks :)
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Algebra.Com's Answer #140518 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
A carpenter goes to a hardware store to buy a specific number of pounds of nails for his business.
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\n" ); document.write( "Let # of pounds be \"x\"
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\n" ); document.write( " The first store he enters sells his favorite-sized nails at nine cents per pound. At this price, the carpenter realizes that he would be short $7.15 if he tried to buy the nails.
\n" ); document.write( "Let \"y\" be the money he has.
\n" ); document.write( "9x = y + 715
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\n" ); document.write( "The carpenter goes to a competing hardware store and finds the nails sell for six cents per pound. He realizes that after paying for the nails, he would have $2.45 left over.
\n" ); document.write( "6x = y -245
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\n" ); document.write( "How many pounds of nails is he trying to buy?
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\n" ); document.write( "Rearrange the equations:
\n" ); document.write( "y= 9x - 715
\n" ); document.write( "y = 6x + 245
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\n" ); document.write( "Substitute to solve for \"x\":
\n" ); document.write( "9x - 715 = 6x + 245
\n" ); document.write( "3x= 960
\n" ); document.write( "x = 320 lbs (# of pounds he is trying to buy)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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