Question 23895
Let dimes be = d
Let nickels be = n
Let pennies = x


n = 3x
d = 2x


Dimes value = 0.1 x 100 =10
Nickel value 0.05 x 100 = 5
Pennie value 0.01 x 100 =1
Total = 1.80 x 100 = 180

10(2x)+5(3x)+(x)=180
20x+15x+x=180
36x=180
x = 5


d = 2(5) = 10
n = 3(5) = 15


Check: 10(10)+5(15)+5 =180
180/100 = $1.80


Hence, there are 5 pennies, 10 dimes and 15 nickels.