Question 1
Question detail
Use a checking method for this problem: final-answer check: solve 2x + 5 = 55. State the final answer and verify it against the information in the question.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Ratio, proportion and rates of change
Question
Use a checking method for this problem: final-answer check: solve 2x + 5 = 55. State the final answer and verify it against the information in the question.
Answer
A valid checked answer is x = 25. The method is: Start with the equation 2x + 5 = 55. Subtract 5 from both sides. Divide both sides by 2. x = 25 The final line agrees with the canonical answer.
Explanation
calculator check keeps the canonical answer x = 25 fixed before the model answer is written, so the worked solution and final answer agree.
Common mistake
Equations of direct and inverse proportion common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Interpret equations that describe direct and inverse proportion..
Show the method first, then give the final answer in the required form. Apply this directly to Equations of direct and inverse proportion.
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