Simplify the expression: 6x - 3x + 2x + 9.

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Multiple Choice

Simplify the expression: 6x - 3x + 2x + 9.

Explanation:
Combining like terms is what this expression needs. You have x-terms: 6x, -3x, and 2x, plus a constant 9. Only terms with x can be combined with each other. Add the coefficients: 6 − 3 + 2 = 5, so the x-terms become 5x. The constant 9 stays as 9. So the expression simplifies to 5x + 9. The other options would require incorrect sums of the x-coefficients or an incorrect sign for the constant.

Combining like terms is what this expression needs. You have x-terms: 6x, -3x, and 2x, plus a constant 9. Only terms with x can be combined with each other. Add the coefficients: 6 − 3 + 2 = 5, so the x-terms become 5x. The constant 9 stays as 9. So the expression simplifies to 5x + 9. The other options would require incorrect sums of the x-coefficients or an incorrect sign for the constant.

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