Posted by dayalyn on Friday, January 4, 2013 at 4:15pm.
Tristan has $3.75 in quarters and dimes. She has 21 coins. How many of each coin does she have?

algebra  Reiny, Friday, January 4, 2013 at 5:47pm
quarters  x
dimes  21x
25x + 10(21x) = 375
25x + 210  10x = 375
15x = 165
x = 11
Tristan has 11 quarters and 10 dimes