Posted by Anonymous on Friday, June 22, 2012 at 7:55pm.
Fido gets 2 doggy treats every time he sits and 4 doggy treats every time he rolls over. Throughout the week, he has sat 6 times as often as he has rolled over. In total, he has earned 80 doggy treats. How many times has Fido rolled over??

Algebra  Damon, Friday, June 22, 2012 at 9:01pm
2 s + 4 r = 80
but s = 6 r
so
16 r = 80
r = 5