Posted by **mary** on Sunday, December 17, 2006 at 8:55pm.

Bill has 30 coins, some nickels some dimes. They equal $2.10. How many nickels are there? What is the equasion used to solve this problem? When I solve it, I get 4.3 nickels, but how can there be .3? Please help me solve

I posted the two equations for this about an hour ago. Show your work and I'll find your error.

N + D = 30

5N + 10D = 210

Multiply the first by 5 and subtract from the second and you will have your answers.

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