document.write( "Question 129279: I worked for a while just trying to find a good formula for this problem and all the ones i found and ennded up solving, came out horribly wrong:\r
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document.write( "A coin bank contains $17.00 in pennies and nickels. If there are 1140 coins in the bank, how many of the coins are nickels?\r
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document.write( "I've been working on it for a while but i always end up eleminating any variables, and i know that isn;t going to help me solve what ever formula i am supposed to use.
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Algebra.Com's Answer #108138 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! P = pennies \n" ); document.write( "N = nickels \n" ); document.write( "P+N = 1140 \n" ); document.write( "P+5N = 1700 (each nickel is 5 cents) \n" ); document.write( "---------- \n" ); document.write( "P = 1140 - N \n" ); document.write( "Sub for P in 2nd eqn \n" ); document.write( "(1140 - N) + 5N = 1700 \n" ); document.write( "1140 + 4N = 1700 \n" ); document.write( "4N = 560 \n" ); document.write( "N = 140 \n" ); document.write( "------ \n" ); document.write( "P = 1140 - N \n" ); document.write( "P = 1000 \n" ); document.write( " \n" ); document.write( " |