A piggy bank contains $5.60 in nickels and dimes. The number of nickels is 8 less than 3 times the dimes. How many nickels and dimes are there in the piggy bank? The piggy bank has nickels and dimes. NextReset

Respuesta :

there are 24 dimes and 64 nickles

Answer:

64 nickels and 24 dimes

Step-by-step explanation:

Let there be x nickels and y dimes

The number of nickels is 8 less than 3 times the dimes

i.e. [tex]x = 3y-8[/tex]

Value of the coins = [tex]5x+10y[/tex]

= 560 cents (given)

Substitute x value in the second equation

[tex]5(3y-8)+10y = 560\\25y = 600\\y =24\\[/tex]

Substitute in

[tex]x = 3y-8\\=64[/tex]

There are 64 nickels and 24 dimes.