Answer:
18
Step-by-step explanation:
First of you subtract 73 from 180. (Because angles on a straight line add to 180)
180- 73= 107
Then equal this to 6m-1
107= 6m-1
+1 +1 to each side
resulting in:
108= 6m
÷6 ÷6
to get:
18 = m
Substitute it back in and it should work.
