document.write( "Question 281604: Please help with a word problem. Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution, state your answer for the specified variable.
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document.write( "A sum of money amounting to $3.80 consists of dimes and quarters. If there are 20 coins in all, how many are quarters? \n" );
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Algebra.Com's Answer #204580 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! d+q=20 (1) \n" ); document.write( "25q+10d=380 (2) \n" ); document.write( "multiply the first by 10 \n" ); document.write( "10q+10d=200 \n" ); document.write( "subtract from second. \n" ); document.write( "15q=180 \n" ); document.write( "q=180/15 \n" ); document.write( "q=12 \n" ); document.write( " \n" ); document.write( " |