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Jonny's first step in solving the equation \(8 + 3n = 20\) is to subtract 8 from both sides of the equation because **8 is attached to 3n by addition**. By subtracting 8 from both sides, he is isolating the term with \(n\) on one side of the equation.
The correct response would be: **8 is attached to 3n by subtraction.**