A leaf is being blown down a sidewalk by swirling gusts of wind. For every five feet that a gust blows it forward, the wind swirls and blows it back two feet. How many feet has it traveled down the sidewalk after 11 gusts of wind?
Each gust blows the leaf forward 5 feet, so 11 gusts will blow it forward 5 * 11 = <<5*11=55>>55 feet.
Each swirl after a gust blows it back 2 feet, so 11 swirls will blow it back 2 * 11 = <<11*2=22>>22 feet.
After 11 gusts, the leaf has traveled 55 - 22 = <<55-22=33>>33 feet down the sidewalk.
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