Posted by **George** on Tuesday, September 13, 2011 at 11:24pm.

The value of 25 coins, consisting of dimes and quarters, is $ 3.55. How many dimes are in the collection?

- Math -
**JJ**, Wednesday, September 14, 2011 at 12:06am
18 dimes = 1.80

7 qtrs = 1.75

Total = the $3.55

Can you work it backwards, as I have no idea how to set an equation. It was instinct for me to see that initially I had to break the 55-cents down and then work with the $3.00.

I'm sorry I can't help with setting the equation. JJ

- Math -
**Cadavz**, Wednesday, September 14, 2011 at 2:21am
Total number of coins = 25

Number of dimes = x

Number of quarters = 25 - x

Value of 1 dime = .10

Value of 1 quarter = .25

Total value of coins = $3.55

The equation:

.10(x) + .25(25 - x) = 3.55

.10x + 6.25 - .25x = 3.55

-.15x + 6.25 = 3.55

-.15x = -2.7

x = 18 dimes

25 - x = 25 - 18 = 7 quarters

- Math -
**George**, Wednesday, September 14, 2011 at 11:07pm
Ok thanks

- Math -
**LISA**, Tuesday, November 1, 2011 at 4:41pm
34.67

## Answer This Question

## Related Questions

- Math - The value of 25 coins, consisting of dimes and quarters, is $ 3.55. How ...
- algebra - Please help....struggling with word problems and please explain how to...
- mathematics - In a collection of nickels, dimes and quarters, there are twice ...
- mathematics - In a collection of nickels, dimes and quarters, there are twice ...
- 6 grade math - Please I need help on just the set up using a guess and check ...
- Math - Ben has a collection of 15 coins in quarters and dimes. There are 7 ...
- Algebra - A coin collection contains 30 coins in nickels, dimes, and quarters. ...
- math - In a collection of nickels, dimes and quarters, there are twice as many ...
- Math help! - A collection of forty-three coins consists of dimes and quarters. ...
- math - When a child breaks open her piggy bank, she finds a total of 76 coins, ...

More Related Questions