"by dealing" is an acceptable part of a sentence in written English.
You can use it to explain how something has been done or will be done. For example: "The company solved the issue by dealing with it promptly."
"People got waylaid by dealing with this issue".
He paid for his habit by dealing in drugs.
They solve problems by dealing, not fighting," he said.
Let's start by dealing with the elephant in the room.
Only by dealing with those interests can the parties resolve their conflict.
We begin by dealing with the spatial grid (i.e. discretization or compartmentalization).
Only by dealing with those interests can the party resolve their conflict.
So we get the really latest technology by dealing with the Yale people.
By dealing only in dollars, he said, the company avoids market fluctuations.
Today Wayne supplements his pension by dealing in collectors' stamps and coins to his neighbours.
Insurgencies can be fixed or ameliorated by dealing with what caused them in the first place.
