Question

There are 23 coins in a bank. All the coins are dimes and quarters. The total value of the coins is $3.80. How many dimes are there? How many quarters?

Answer 1

these question are looking mighty familiar

Answer 2

No. of dimes (d):
10d + 25(23 - d) = 380
2d + 5(23 - d) = 76
2d + 115 - 5d = 76
3d = 39
d = 13

No. of quarters:
= 23 - 13
= 10

Answer 3

try \[10x+25(23-x)=380\]

Answer 4

what randicandi said

Answer 5

ty:D