Simplify 2x + 3x - x. Which expression is correct?

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Multiple Choice

Simplify 2x + 3x - x. Which expression is correct?

Explanation:
Combine like terms by adding the coefficients of terms with the same variable. All terms here are multiples of x, so add 2, 3, and −1: 2 + 3 − 1 = 4. This gives 4x. The negative sign subtracts 1 from the total, not adds. A frequent slip is treating the minus as a plus, which would give 6x; that comes from incorrect sign handling. Dropping a term or misreading the signs can lead to 2x or x, but the correct process keeps every term and applies the minus sign properly, yielding 4x.

Combine like terms by adding the coefficients of terms with the same variable. All terms here are multiples of x, so add 2, 3, and −1: 2 + 3 − 1 = 4. This gives 4x. The negative sign subtracts 1 from the total, not adds. A frequent slip is treating the minus as a plus, which would give 6x; that comes from incorrect sign handling. Dropping a term or misreading the signs can lead to 2x or x, but the correct process keeps every term and applies the minus sign properly, yielding 4x.

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