This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Solving a linear equation in one variable
Prompt focus: Review the prompt, identify the command word, and connect the facts to the tested objective.
Why the correct answer works
21
Subtract the $35 fixed fee, then divide $399 by $19; the result is 21 classes.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
Review this skill: Solving a linear equation in one variable. Use the stem's deciding facts, then verify the choice against the units, timing, evidence, or safety condition stated in the question.
Simple analogy
Think of solving a linear equation in one variable like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.