Question 27112
Let the pennies be x
Let the nickels be 2x
Let the dimes be y


so:
x+2x+y=45 comin total solve for y
y=45-3x (subsitution)


Nickels value = 5
Dime value = 10
Pennie value = 1
Total value = 260


5(2x)+10(y)+x=260 (subsitute for y)
10x+10(45-3x)+x=260
10x+450-30x+x=260

-19x=-190
x=10


2(10)=20
y=45-3(10)
y=45-30
y=15


Hence, there were 10 pennies, 20 nickels and 15 dimes.
Paul.