Simplify 2(x + 4) - 3x.
Answer and explanation
Correct answer: D. 8 - x, after expanding the bracket and collecting the x terms
- Step 1: Expand: 2x + 8 - 3x. Step 2. Collect x terms: 2x - 3x = -x, giving 8 - x. Answer: 8 - x. Why not the others: 8 + x adds the like terms instead of subtracting; 5x + 8 changes the sign of 3x; 8 - 5x wrongly multiplies 3x by 2.
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