Posted by Laurie on Friday, April 3, 2009 at 8:20pm.
Lianne has nineteen coins worth $1.45. Some of her coins are dimes & the rest are nickels. How many dimes does she have?

Math  Reiny, Friday, April 3, 2009 at 11:43pm
d+n=19
10d + 5n = 145
divide this second equation by 5
2d + n = 29
subtract the first from the second...
easy.....