Answer:a
Step-by-step explanation:
a
x + 107 + 34 = 180
x + 141 = 180
x. = 180 - 141
x = 39
the above method can be used if the angles are the interior angles of triangle or for all angles in a straight line .
Answer:
the amswer is d hope this helps
x+x+x=3x
2-1=1
3x+1
this is ansver