Respuesta :

X + 67 + 52 = 180
X + 119 = 180
Minus 119 to both sides
X = 61


Hope this helps :)
By the Triangle Sum Theorem, the sum of all three interior angles in a triangle is 180°.

Therefore:

67+52+x=180

119+x=180

x=61

Checking work:

119+(61)=180

So x=61