Question

billy has a box of coins that he uses when playing poker with friends the box currently contains 37 coins, consisting of pennies, dimes, and quarters. the number of pennies is equal to the number of dimes, and the total value is $2.23. how many of each denomination of coin does he have?

Answer 1

Salamz.

Answer 2

heeyy salamz!

Answer 3

the number of pennies which is equal to dimes is?....
and the number of quarters is?...

Answer 4

Wow iraqichick. long time no see :D

Answer 5

i know!! hiiii heroo!!

Answer 6

been busy with new job and classes!! im finish up my final now!!

Answer 7

I see

Answer 8

hero is awesome

Answer 9

!

Answer 10

yes he is!

Answer 11

I'm hero number 1 fan

Answer 12

x + y + z = 37
.01x + .10y + .25z = 2.23

Answer 13

how do i solve that

Answer 14

by substitution

Answer 15

First eliminate the z variable.

Answer 16

z = 37 - x - y

Answer 17

Now substitute that into the second equation where z is:
.01x + .10y + .25(37-x-y) = 2.23

Answer 18

oh god no lol

Answer 19

Yeah, there's actually an easier way to do it. With this method, you end up substituting twice

Answer 20

That's why nobody likes to do these