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If (y=96-8x), which value of (x) gives (y=40)?
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Answer and explanation
Correct answer: 7
Given (y=96-8x) and (y=40), we get (96-8x=40). Subtracting 96 from both sides gives (-8x=-56), so (x=7). If x=6, then y=48, not 40. Exam tip: When moving or simplifying negative terms, track the signs on both sides carefully.
Frequently asked questions
What is the correct answer to this question?
7
Why is this the correct answer?
Given (y=96-8x) and (y=40), we get (96-8x=40). Subtracting 96 from both sides gives (-8x=-56), so (x=7). If x=6, then y=48, not 40. Exam tip: When moving or simplifying negative terms, track the signs on both sides carefully.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
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