document.write( "Question 357931: Post card stamps are $.20 each. While letter stamps cost $.33 each. If you have 50 stamps worth $12.60, how many of each type do you have? \n" ); document.write( "

Algebra.Com's Answer #255495 by stanbon(75887) $\"\"$ $\"About$

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Post card stamps are $.20 each. While letter stamps cost $.33 each. If you have 50 stamps worth $12.60, how many of each type do you have?
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\n" ); document.write( "Let the number of post card stamps be \"c\".
\n" ); document.write( "The cost of c of these stamps is 20c cents.
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\n" ); document.write( "Let the number of letter stamps be \"s\"
\n" ); document.write( "The cost of s of these stamps is 33s cents.\r
\n" ); document.write( "\n" ); document.write( "Equations:
\n" ); document.write( "Quantity Eq.::: c + s = 50 stamps
\n" ); document.write( "Value Eq:::::: 20c+33s = 1260 cents
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\n" ); document.write( "Set up the equations for elimination.
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\n" ); document.write( "Multiply thru the 1st equation by 20 to get:
\n" ); document.write( "20c + 20s = 20*50
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\n" ); document.write( "Subtract that from the Value Eq. and solve for \"s\":
\n" ); document.write( "13s = 260
\n" ); document.write( "s = 20 (# of letter stamps)
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\n" ); document.write( "Since c+s = 50, c = 30 (# of post card stamps.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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