Posted by Benjamin on Sunday, May 17, 2009 at 1:23pm.
Militsa has 4 times as many nickels as dimes. Their total value is $8.10. How many of each coin does she have

algebra  drwls, Sunday, May 17, 2009 at 1:58pm
Let N be the number of nickels and D be the number of dimes. Here is what you know:
N = 4D
10D + 5N = 810

Now substitute 4D for N
10D + 20D = 810
30D = 810
You take it from there 
algebra  bob sanhowyour, Monday, October 18, 2010 at 4:32pm
30D=810 check
=D=810/30 108*.05+27*.1=8.1
=D=27 5.4+2.7=8.1
8.1=8.1
x=y*4
x=27*4
x=108
y=27 
algebra  mae, Tuesday, April 21, 2015 at 2:13pm
85

algebra  mae, Tuesday, April 21, 2015 at 2:13pm
jk idk how