Question 825104
This is just like a two part mixture problem.  The concentration, instead of percent, is grams per coin.  All of the variables work the same way.  You can study my two-part mixture lesson linked in my profile.


H = 5 grams per coin for nickels
T = 1483/425  grams per coin, the current combination of coins, dimes and nickels
L = 2.268 grams per coin for dimes
M = 425 how many coins
u = how many dimes
v = how many nickels


Two equations to make from this are:

{{{(Lu+Hv)/M=T}}} and {{{u+v=M}}}
Solve for u and v.