document.write( "Question 1073786: You are saving dimes and quarters in your piggy bank. You have 42 coins that have a total value of $6.75. How many dimes and quarters do you have in your piggy bank? \n" ); document.write( "
Algebra.Com's Answer #688571 by addingup(3677)\"\" \"About 
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d+q = 42 subtract d from both sides: q = 42-d
\n" ); document.write( "and
\n" ); document.write( "0.10d+0.25q = 6.75 substitute here for q:
\n" ); document.write( "0.10d+0.25(42-d) = 6.75
\n" ); document.write( "0.10d+10.50-0.25d = 6.75
\n" ); document.write( "-0.15d = -3.75 divide both sides by -0.15 and remember -/- = +
\n" ); document.write( "d = 25 So you have 25 dimes and:
\n" ); document.write( "42-25 = 17 quarters
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\n" ); document.write( "Check:
\n" ); document.write( "0.10(25) = 2.50
\n" ); document.write( "0.25(17) = 4.25
\n" ); document.write( "Total . . 6.75 Correct
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