Help plz I’ll mark Brainly

Answer:x=2; second option
Step-by-step explanation:
120+10x=140
10x=20
X=2
Answer:
x=2
Step-by-step explanation:
triangles are always equal to 180 degrees and lines are also always equal to 180 degrees
we are given 120 degrees
we subtract 140 to get the measure of the angle inside the triangle
40
120+40= 160
180-160
the third angle is 20 degrees
Also please mark brainly I need it