is 2x equal to x+x?

⇥We solve in ℝ: 2x = x + x
⇥ⓘ Like terms are grouped by adding their coefficients: x + x = 2x
⇥ 2x = 2x
⇥ 2x -2x = 0
⇥ⓘ Like terms are grouped by adding their coefficients: 2x -2x = 0
⇥ 0 = 0
⇥Solution obtained: x ∈ ℝ
▶2x and x + x are equal for all admissible values

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