Question

Wong's left at 7:00. It took him one and a half hours to check in at the airport. His house is an hour drive from the airport. At what time did Wong leave his house to get to the airport?
I am assuming it is a plane that left at 7:00.

(7:00)-(1.5 hrs check-in)-(1hr drive from house)=4:30
I suck at math. i may be good at it sometimes but the rest ARGGGGG
who else homeschools whoever does plz help me.
Oh and i think the answer is 4:30
I am home schooled to
600

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