Answer:
c) 180°- ( 4x - 5 ) °
Step-by-step explanation:
It can be seen that angle m4 and m3 are on the same straight line
Also, sum of angles on a straight line = 180°
So if m3 + m4 = 180
when m4 = (4x - 5 )
m3 + ( 4x - 5 ) = 180°
m3 = 180° - ( 4x - 5 ) °
