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July 25, 2014

July 25, 2014

Posted by **Christina** on Tuesday, January 12, 2010 at 9:26pm.

Can you show me the two equations you got and explain

-Thanks

- Algebra -
**drwls**, Wednesday, January 13, 2010 at 12:02am25 Q + 10 D = 3285 (the total number of cents)

Q + D = 171 (the total number of coins)

To solve, multiply the second equation by 10.

10 Q + 10D = 1710

Now subtract one equation from the other.

15 Q = 1575

Q = 105

D = 171 - 105 = 66

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