Noah and William like to share stickers. If Noah gives 50 stickers to William, the ratio of Noah to William's stickers will be 1 : 5. If Noah gives 60 stickers to William, their ratio will be 1 : 11. How many stickers does Noah have?
N==Noah, W==William
[N - 50] / [W + 50] ==1/5
[N - 60] / [W + 60] ==1 / 11, solve for N, W
N==70 stickers - what Noah had at the start
W ==50 stickers - what William had at the start.
+5 
