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Solve the system of equation 2\(^{x + y}\) = 32, \(3^{3y - x}\)  = 27

Mathematics
JAMB 1980

Solve the system of equation 2\(^{x + y}\) = 32, \(3^{3y - x}\)  = 27

  • A. (3, 2)
  • B. (-3, 2)
  • C. (3, -2)
  • D. (-3, -2)
  • E. (2, 2)
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Correct Answer: Option A
Explanation

\(2^{x + y} = 32, 3^{3y - x}\) = 27

\(2^{x + y} = 2^5\)

\(3^{3y - x} = 3^3\)

equating powers, we have

x + y = 5 ------------1

3y - x = 3 ------------2

solving simultaneously(any method)

x =  3 and y = 2
 


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