Question

Bob has $2.90 in pennies, nickels and dimes. He has the same number of pennies and nickels. If the number of dimes is 5 more than the number of nickels, how many of each type of oin does he have?

Answer 1

x+x+x+5=2.90
3x=2.1
x=7
7 pennies
7 nickel
and 10 dimes

Answer 2

oh cool, thanks

Answer 3

np

Answer 4

wait i think its wrong

Answer 5

10D +5N +P = 290
P=N
D = 5+N
use substitution
10(5+N) +5N +N = 290
50 +10N +5N +N = 290
16N+50 = 290
16N = 240
N = 15
then P = 15
D = 5+15 = 20