Question 970182
This can't be solved.  The centavos have to be 15 in order to get 0.75
The pesos then are 5, and the cost is 5.75.  
Am I missing something?  a centavo is 1/20th of a peso, right?

x=5 centavo number
20-x= peso

x*(.05) + (20-x)1=8.75      This relates the number of coins to the cost.
.05x + 20-x = 8.75

collect terms and subtract 20 from both sides

-0.95 x  =  -11.25
Multiply both sides by (-1)

0.95 x = 11.25
This is not an integer.  It is close to 12 but NOT 12.

12 centavos = 0.60  
8 pesos =8.00   Doesn't work

15 centavos=0.75
5 pesos=5.00   Doesn't work

No solution!!!