document.write( "Question 1027172: Bob and Regina have 36 coins that are nickels and dimes. If the value of the coins is $2.90 how many coins of each type do they have? \n" ); document.write( "
Algebra.Com's Answer #642436 by addingup(3677)\"\" \"About 
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n+d = 36 subtract d from both sides
\n" ); document.write( "n = 36-d We'll use this value for n next
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\n" ); document.write( "0.05n+0.10d = 2.90 substitute for n
\n" ); document.write( "0.05(36-d)+0.10d = 2.90
\n" ); document.write( "1.80-0.05d+0.10d = 2.90
\n" ); document.write( "0.05d = 1.10
\n" ); document.write( "d = 22
\n" ); document.write( "n = 36-22 = 14
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\n" ); document.write( "Check:
\n" ); document.write( "d= 22 = 2.20
\n" ); document.write( "n= 14 = 0.70
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\n" ); document.write( "Total . :2.90 Correct
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