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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 7 - No. 13)

Which of the following is the simplified form of the expression 3x + 2x - x?
4x
5x
2x
6x

설명

Combining like terms: 3x + 2x - x = (3 + 2 - 1)x = 4x.

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