algebra
posted by sam .
nicole has $2.20 in nickels and quarters. she has 16 coins all together. how many of each does she have?
chris has $3.20 in dimes and quarters. he has 17 all together. how many of each does he have?

It's not necessary to change names on this forum. It's obvious that these four questions were posted by one person.

yeah i know i didn't think you would answer all of thes questions. can you help me w/ at least 2 please. i need to know the steps then i can do the other problems

Your last four money questions are the same type
If will do one, then you try the others.
let the number of nickels be x
then the number of quarters is 16x
5x + 25(16x) = 220
5x + 400  25x = 220
20x = 180
x = 9
so 9 nickels and 7 quarters
check: 9 nickels and 7 quarters = 16 coins
value: 9x5 = 7x25 = 220 
where is the 25 and 5x from?

25 = 25 cents = 1 quarter
5 = 5 cents = 1 nickel 
PAM AND PAT HAVE $20 ALTOGETHER PAM HAS $4 MORE THAN PAT HOW MUCH MONEY DOES PAM HAS$