Question

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Answer 1

Recuerda:

$\cos(60) = \frac{1}{2} \\ \tan(45) = 1 \\ \csc(53) = \frac{5}{4}$

Reemplazando:

$\frac{ \frac{x}{2} + 1 }{ \frac{x}{2} - 1} = \frac{5}{4} \\ 2x + 4 = \frac{5x}{2} - 5 \\ 4x + 8 = 5x - 10 \\ 5x - 4x = 10 + 8 \\ x = 18$