Posted by Tiffany on .
Sally has three times as many dimes as nickels and twice as many quarters as dimes.In all she has $5.55. How many coins of each type does she have?
Let 2x=quarters
3x=dimes
x=nickles < is that correct please help put

MATH (PLease HELp) 
abby,
i think the answer is
3 nickels .15
9 dimes .90
18 quarters 4.50
total 5.50 
MATH (PLease HELp) 
Steve,
It's easy enough to check.
The numbers add up, and the values add up.
You added wrong at the very end. 4.50 + .90 + .15 does indeed make 5.55
However, your equations do not represent the facts:
x = nickels
3x = dimes
2(3x) = 6x = quarters
5x + 10(3x) + 25(6x) = 555
185x = 555
x=3 
MATH (PLease HELp) 
patricia,
Megan has three times as many quarters than nickels. She has one less dime than the number of quarters. If she has a total of $4.30, how many of each coin does she have ?

MATH (PLease HELp) 
Trevor,
Nickels = x
Quarters = 3x
Dimes = 3x1
Plug in equation with coin values in ()...
(5)x + (25)3x + (10)3x1 = 430
5x + 75x + 30x  10 = 430
80x + 30x  10 = 430
110x 10 = 430
110x 10 +10 = 430 + 10
110x = 440
x = 4
Nickels = 4 (x)
Quarters = 12 (3x)
Dimes = 11 (3x1)
4x5=20 N
12x25=300 Q
11x10=110 D /
/
20+300+110= 430 cents \/