We have a jar of coins, all pennies and dimes. together we have 263 coins and total value in the jar is $9.20. how many pennies are in jar?

I can help you to find the answer changing a little bit the question

You simply need to substitute the values to find the right answer

You can set up a simple equation.

0.25x+0.10y=34.60

x+y=238

You can solve this by any method you like, if I do elimination Multiplying the first one by 4, I can isolate y from the second one substracting 4 times the first one from the second one.

x+y=238

-(x+0.4y=138.4)

= 0.6y=99.6

Y=99.6/0.6= 166.

That means there are 166 dimes or$16.6 in dimes.

Now we can substitute in the first equation and x+166=238.

So there are 72 quarters in the jar