Question 1002488
p = number of pennies
d = number of dimes


p + d = 25
p + 10d = 124


Multiply the first equation by 10. We are eliminating the variable d.


10p + 10d = 250
p + 10d = 124


Subtracting, we get 9p = 126, or p = 14.


There are 14 pennies and 11 dimes.