document.write( "Question 291667: An office has some .20 stamps and some .28 stamps. All together the office has 140 stamps for a total value of $31.20. How many of each type of stamp does the office have? Using only x \n" ); document.write( "
Algebra.Com's Answer #210853 by richwmiller(17219)\"\" \"About 
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.2*x+.28(140-x)=31.20
\n" ); document.write( "100 20 centers and 40 28 centers
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