Hello
Given angle a and b are in linear pair.
So,
a + b = 180
a = 180 - b
Also, given
a - 2b = 30
Putting a = 180 - b
180 - b - 2b = 30
180 - 3b = 30
180 - 30 = 3b
150 = 3b
3b = 150
b = 150/3
b = 50
Now,
a = 180 - b
Putting b = 50
a = 180 - 50
a = 130
So, a = 130, b = 50
Written on Nov. 10, 2017, 9:32 p.m.