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If (x=5), what is the value of (3x-2)?
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Answer and explanation
Correct answer: 13
Given x=5, substitute 5 for x in 3x-2: 3(5)-2=15-2=13. Therefore, the correct answer is 13. The close distractor 15 results from calculating 3×5 but not subtracting 2. Exam tip: after substitution, perform multiplication or division before addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
13
Why is this the correct answer?
Given x=5, substitute 5 for x in 3x-2: 3(5)-2=15-2=13. Therefore, the correct answer is 13. The close distractor 15 results from calculating 3×5 but not subtracting 2. Exam tip: after substitution, perform multiplication or division before addition or subtraction.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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