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Friday, October 20 2017 @ 12:48 PM CDT
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By: MissSunshine11 (offline)  Friday, April 27 2012 @ 04:48 AM CDT (Read 1420 times)  
MissSunshine11

Hello.

Could someone help me solve this problem???

Judy has 240 coins with a total value of $79.50 in her piggy bank. If she has only twenty-cent and fifty-cent coins, how many twenty-cent coins does she have?

I hope someone could help me without using guess and check

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By: daiwa298 (offline)  Friday, April 27 2012 @ 05:37 AM CDT  
daiwa298

Assume all 240 coins are 20 cts.

240 x $0.20 = $48

$79.50 - $48 = $31.50

$0.50 - $0.20 = $0.30

$31.50 / $0.30 = 105 number of 50 cts coin

240 - 105 = 135 number of 20 cts coin

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By: MissSunshine11 (offline)  Tuesday, May 08 2012 @ 07:36 AM CDT  
MissSunshine11

Thank you Big Grin

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