Question detail

exam warm-up: simplify 3x + 4x by collecting like terms.

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Notation, vocabulary and manipulation

Question

A. 7x
B. 8
C. 6
D. 14

Answer

The correct answer is 7x.

Explanation

The locked answer is 7x. Work through the given values, keep one operation per line, and check the final step reaches 7x.

Common mistake

Formulae and rearranging common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Understand and use standard mathematical formulae, including formulae written in words and symbols..

Show the method first, then give the final answer in the required form. Apply this directly to Formulae and rearranging.

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