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Tiffanny has 100 coins in dimes and nickels. She has a total of $5.80. How many of each coin does she have. Write the equations then solve.
12 years ago

Answers

Steve
10d + 5(100-d) = 580
10d + 500 - 5d = 580
5d = 80
d = 16

so, 16 dimes: $1.60
84 nickels: $4.20
12 years ago
Rayyan
I'm doing systems of equations so can you do it
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X+y= 100. Y=-x+100
10x+5y=580. Y=-2x+116
12 years ago

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