document.write( "Question 280059: a boy was sent to the pst office with $16.25 to buy 2, 3, and 5 cent stamps. he bough 50 mre 3 cent stamps than 2 cent stamps and 25 less 5cent stampsthan 2 cent stamps. how many f each kind did he buy?\r
\n" ); document.write( "\n" ); document.write( "if someone can please help me understnd how to do this question it will be greatly appraicated.
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Algebra.Com's Answer #203567 by Stitch(470)\"\" \"About 
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Set-Up
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\n" ); document.write( "Let A = 2 Cent stamps
\n" ); document.write( "Let B = 3 Cent stamps
\n" ); document.write( "Let C = 5 Cent stamps
\n" ); document.write( "Notice that each statement is in terms of the 2 cent stamps.
\n" ); document.write( "Equation 1: \"A+%2B+50+=+B\"
\n" ); document.write( "Equation 2: \"A+-+25+=+C\"
\n" ); document.write( "Equation 3: \"0.02A+%2B+0.03B+%2B+0.05C+=+16.25\"\r
\n" ); document.write( "\n" ); document.write( "Solution
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\n" ); document.write( "Use substitution.
\n" ); document.write( "Substitute equation 1 and 2 into equation 3
\n" ); document.write( "Equation 3: \"0.02A+%2B+0.03B+%2B+0.05C+=+16.25\"
\n" ); document.write( "\"0.02A+%2B+0.03%2A%28A+%2B+50%29+%2B+0.05%2A%28A+-+25%29+=+16.25\" Simplify
\n" ); document.write( "\"0.02A+%2B+0.03A+%2B+1.5+%2B+0.05A+-+1.25+=+16.25\" Combine like terms
\n" ); document.write( "\"0.1A+%2B+0.25+=+16.25\" subtract 0.25 from both sides
\n" ); document.write( "\"0.1A+=+16\" Divide both sides by 0.1
\n" ); document.write( "\"highlight%28A+=+160%29\"\r
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\n" ); document.write( "Now plug 160 into equations 1 & 2 for A
\n" ); document.write( "Equation 1: \"A+%2B+50+=+B\"
\n" ); document.write( "\"160+%2B+50+=+B\"
\n" ); document.write( "\"highlight%28210+=+B%29\"\r
\n" ); document.write( "\n" ); document.write( "Equation 2: \"A+-+25+=+C\"
\n" ); document.write( "\"160+-+25+=+C\"
\n" ); document.write( "\"highlight%28135+=+C%29\"\r
\n" ); document.write( "\n" ); document.write( "Check the answers:
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\n" ); document.write( "You can check your answers by plugging in the values into equation 3
\n" ); document.write( "Equation 3: \"0.02A+%2B+0.03B+%2B+0.05C+=+16.25\"
\n" ); document.write( "\"0.02%2A%28160%29+%2B+0.03%2A%28210%29+%2B+0.05%2A%28135%29+=+16.25\"
\n" ); document.write( "\"3.2+%2B+6.3+%2B+6.75+=+16.25\"
\n" ); document.write( "\"highlight%2816.25+=+16.25%29\"
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