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A plane and a helicopter are both flying toward Clover City Airport. The plane is $1,200$ miles from the airport, and it is flying at a constant speed of $510$ miles per hour. The helicopter is $500$ miles from the airport, and it is flying at a constant speed of $160$ miles per hour. Which equation can you use to find $h$, the number of hours it will take for the plane and the helicopter to be the same distance from the airport?