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The solution to the simultaneous equations 3x + 5y = 4, 4x + 3y = 5 is

The solution to the simultaneous equations 3x + 5y = 4, 4x + 3y = 5 is
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  • A (\(\frac{-13}{11}, \frac{1}{11}\))
  • B (\(\frac{13}{11}, \frac{1}{11}\))
  • C (\(\frac{13}{11}, \frac{-1}{11}\))
  • D (\(\frac{11}{13}, \frac{1}{11}\))
  • E (13, 11)
Correct Answer: Option B
Explanation:
3x + 5y = 4, 4x + 3y = 5
3x + 5y = 4 x 4
4x + 3y = 5 x 3
12x + 20y = 16.....(i)
12x + 9y = 15.......(ii)
subtract eqn.(ii) from eqn.(i)
11y = 1
y = \(\frac{1}{11}\)
12x + 20 x \(\frac{1}{11}\) = 16
12x = \(\frac{156}{11}\)
x = \(\frac{13}{11}\)
= \(\frac{13}{11}, \frac{1}{11}\)

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