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Solve for x and y respectively 3x - 5y = 9 6x - 4y =...

Mathematics
JAMB 2016

Solve for x and y respectively
3x - 5y = 9
6x - 4y = 12
  • A. \(\frac{3}{4}\), 1
  • B. \(\frac{4}{3}\), 1
  • C. \(\frac{3}{4}\), -1
  • D. \(\frac{4}{3}\), -1
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Correct Answer: Option D
Explanation
3x - 5y = 9 ------x2
6x - 4y = 12 -----x1
6x - 10y = 18
-6x - 4y = 12
____________
\(\frac{6y}{-6}\) = \(\frac{6}{6}\)

y = -1
in eq (1) 3x - 5y = 9
3x - 5(-1) = 9
3x + 5 = 9
3x = 4
x = \(\frac{4}{3}\)

There is an explanation video available below.


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Explanation Video

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