careless850
Your piggy bank has a total of 41 coins in it; some are dimes and some are nickels. If you have a total of $3.45, how many nickels do you have?



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Hero
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n + d = 41
.05n + .10d = 3.45
solve the system

careless850
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What system?

careless850
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5?

Hero
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Ever heard of systems of equations?

careless850
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I believe.

careless850
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Forgot though.

careless850
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I forget things easily.

Hero
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I'm sorry to hear that.

careless850
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Why's that?

vparikh
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You need that to solve the problem...

careless850
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I don't know how to solve it!

vparikh
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Use the system of equations, solve for each variable.

careless850
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Could you explain how to use them?

Hero
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There are different ways to solve systems of equations.


careless850
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I have 3 nickels.

careless850
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No, 5 nickels.

careless850
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Right, vparikh

careless850
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?