document.write( "Question 242168: A person has quarters and dimes that total $2.80. The number of dimes is 7 more than the number of quarters. How many of each coin does the person have \n" ); document.write( "
Algebra.Com's Answer #177286 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! A person has quarters and dimes that total $2.80. The number of dimes is 7 more than the number of quarters. How many of each coin does the person have \n" ); document.write( "--------------------------------------- \n" ); document.write( "Equations: \n" ); document.write( "Quantity Eq::: d = q + 7 \n" ); document.write( "Value Eq:::::: 10d + 25q = 280 cents \n" ); document.write( "------------------------------------------- \n" ); document.write( "Substitute for \"d\" in the and Value Eq. and solve for \"q\": \n" ); document.write( "--- \n" ); document.write( "10(q+7) + 25q = 280 \n" ); document.write( "35q = 210 \n" ); document.write( "q = 6 (# of quarters) \n" ); document.write( "--- \n" ); document.write( "Substitute into d = q + 7 to get d = 13 (# of dimes) \n" ); document.write( "===================================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |