document.write( "Question 465846: My piggy bank contains $19.75 in dimes and quarters, there are 100 coins in all, how many dimes are there? How do I solve this? \n" ); document.write( "
Algebra.Com's Answer #319235 by scott8148(6628)\"\" \"About 
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simultaneous equations\r
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\n" ); document.write( "\n" ); document.write( "\"$19.75 in dimes and quarters\" ___ 10d + 25q = 1975\r
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\n" ); document.write( "\n" ); document.write( "\"there are 100 coins in all\" ___ d + q = 100 ___ 25d + 25q = 2500\r
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\n" ); document.write( "\n" ); document.write( "subtracting equations (to eliminate q) ___ 15d = 525
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