When solving the equation x + 2x = 2 × 5 + 1, in the first step (), we get 3x + 11; in the second step (), we get x = 11 / 3

When solving the linear equation of one variable x + 2x = 2 × 5 + 1, the first step (merging the similar terms) is 3x + 11; the second step (using the properties of the equation) is x = 11 / 3

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