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Josh is rollerblading to Ann's house. It is very windy. There is only fifteen feet between Josh's house and Ann's house. Josh rollerblades forward four feet, but the wind blows him back one foot. This happens again and again until Josh finally gets to Ann's house. How far does Josh rollerblade forward and backward before he reaches Ann's house.

User JKraut
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20ft forwar and 5 ft backwards to reach the house
User Dbenhur
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