Bunuel wrote:

If 4x − 3y = 13 and 5x + 2y = −1, then x =

A. −3

B. −1

C. 1

D. 3

E. 5

We know that 4x - 3y = 13

To find the value of y: 3y = 4x - 13 -> y = \(\frac{4x - 13}{3}\)

Substuting the value of y in the second equation

\(5x + 2(\frac{4x - 13}{3}) = -1\) -> \(5x + \frac{8x - 26}{3} = -1\) -> \(15x + 8x - 26 = -3\) -> \(23x=23\)

Therefore, the value of x is 1

(Option C)
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