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OpenStudy (anonymous):
Your piggy bank has a total of 18 coins in it; some are dimes and some are nickels. If you have a total of $1.40, how many nickels do you have? 14 12 10 8
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OpenStudy (king):
let dimes be x , nickels are y, now x+y=18 also, value(x)+value(y)=1.4$ 10x+5y=140 2x+y=28 now subtract, x=10 y=8
OpenStudy (king):
10 dimes 8 nickels
OpenStudy (anonymous):
Thank's!
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