Question

tion 4:
find the $m\angle dwn$.

Explanation:

Step1: Use exterior angle theorem

$m\angle DWN = m\angle N + m\angle H$
$3x = 5x + (7x - 15)$

Step2: Simplify and solve for $x$

$3x = 12x - 15$
$15 = 12x - 3x$
$15 = 9x$
$x = \frac{15}{9} = \frac{5}{3}$

Step3: Calculate $m\angle DWN$

$m\angle DWN = 3x = 3\times\frac{5}{3}$

Answer:

$5$