Posted by **Angie** on Monday, March 14, 2011 at 5:09pm.

Bill and Rosa have only nickels and dimes. Rosa has 75 cents and Bill has 90 cents. Each has the same number of coins and Bill has the same number of dimes as Rosa has nickels. How many nickels does Rosa have?

- math -
**Reiny**, Monday, March 14, 2011 at 5:56pm
If "each has the same number of coins and Bill has the same number of dimes as Rosa has nickels", then

obviously Bill will have to have the same number of nickels as Rosa has dimes

Bill: number of dimes ---x , number of nickels ---y

Roas: number of dimes --y , number of nickels ---x

Bill equation: 10x + 5y = 90

Rosa equation: 10y + 5x = 75

I would double one of them and subtract, easy after that.

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**Karen**, Monday, March 14, 2011 at 7:05pm
i dnt get ti ...this is so cionfusing

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**Sean**, Sunday, November 11, 2012 at 10:07pm
Bill has 7 dimes and 4 nickels

Rosa has 7 nickels and 4 dimes

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