SOLUTION: paul has twice as many dimes as pennies and 3 times as many nickels as pennies. In all he has $1.80. How many coins of each type does he have?

Question 23895: paul has twice as many dimes as pennies and 3 times as many nickels as pennies. In all he has $1.80. How many coins of each type does he have?
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
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.
RELATED QUESTIONS
paul has twice as many dimes as pennies and 3 times as many nickels as pennies. in all he (answered by josmiceli)

Paula has twice as many dimes as pennies and three times as many nickels as pennies.She... (answered by ptaylor)

dan has twice as many nickles as pennies and 5 times as many dimes as pennies in all he... (answered by Alan3354)

Colin has pennies, nickels and dimes in his piggybank. He has twice as many nickels as... (answered by SwiftAlbatross)

Megan has $1.10 in dimes,nickels, and pennies.She has three times as many nickels as... (answered by CubeyThePenguin)

Sanchez has a collection of pennies, nickels, and dimes worth $9.35. He has five more... (answered by addingup)

Meghan has $1.10 in dimes, nickels, and pennies. She has three times as many nickels as... (answered by josgarithmetic)

lucas has 18 coins, pennies, nickels, and dimes in his pocket. there are three times as... (answered by josmiceli)