Sully is having a party and wants to fill his swimming pool. If he only uses his hose, it takes

Sully is having a party and wants to fill his swimming pool. If he only uses his hose, it takes 4 hours more than if he only uses his neighbor’s hose. If he uses both hoses together, the pool fills in 5 hours. How long does it take for each hose to fill the pool (in hr)?

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