document.write( "Question 957237: Marta has $1.70 in quarters and dimes. She has 8 coins altogether. How many coins of each kind does she have? \n" ); document.write( "
Algebra.Com's Answer #584887 by checkley77(12844)\"\" \"About 
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Q+D=8 OR Q=8-D
\n" ); document.write( ".25Q+.10D=1.70
\n" ); document.write( ".25(8-D)+.10D=1.70
\n" ); document.write( "2.00-.25D+.10D=1.70
\n" ); document.write( "-.15D=1.70-2.00
\n" ); document.write( "-.15D=-.30
\n" ); document.write( "D=-.30/-.15
\n" ); document.write( "D=2 DIMES.
\n" ); document.write( "Q+2=8
\n" ); document.write( "Q=6 QUARTERS.
\n" ); document.write( "PROOF:
\n" ); document.write( ".25*6+2*.10=1.70
\n" ); document.write( "1.50+.20=1.70
\n" ); document.write( "1.70=1.70
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