Question

hallar el valor de x.

Explanation:

Step1: Recall exterior - angle property

The exterior - angle of a triangle is equal to the sum of the two non - adjacent interior angles.
Let the exterior angle be $120^{\circ}$, and the two non - adjacent interior angles be $49^{\circ}$ and $x$. So, $120 = 49+x$.

Step2: Solve for $x$

Subtract 49 from both sides of the equation: $x=120 - 49$.
$x = 71$.

Answer:

$71$