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What is the value of x when y = 5? y = \(\frac{1}{2}\)  x + 1

Mathematics
WAEC 2010

What is the value of x when y = 5?

y = \(\frac{1}{2}\)  x + 1

  • A. 8
  • B. 9
  • C. 10
  • D. 11
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Correct Answer: Option A
Explanation

when y = 5; x = ?; y = \(\frac{1}{2}\)x + 1

5 = \(\frac{1}{2}\)x + 1

5 - 1 = \(\frac{1}{2}\)x

4 = \(\frac{1}{2}\)x

x = 4 x 2

x = 8


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