Question

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Answer 1

AB and CD are interesting lines

Therefore, the angles formed will be equal (vertically opposite angles).

Hence,

$(5x - 10) = (3x + 40)$

Now,

$5x - 10= 3x + 40$

$5x - 3x = 40 + 10$

$2x = 50$

$x = \frac{50}{2}$

$x = 25$