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WAEC Mathematics 2015 Question 43

Question 43

Linear and Simultaneous Equations

Find the value of p if ¼p + 3q = 10 and 2p − ⅓q = 7.

  1. A.4
  2. B.3
  3. C.−3
  4. D.−4
Show the answer and explanation

Answer: A (4)

Explanation

From the second equation q = 6p − 21. Then ¼p + 18p − 63 = 10, so 73p/4 = 73 and p = 4.