angle a and angle b form a linear pair. a-2b = 30. find a and b.

As angle a and b form a linear pair a+b=180---(i)

also a-2b=30-----(ii)

now subtracting (i) from (ii) we get

a-2b-(a+b)=30-180

a-2b-a-b= -150

-3b= -150

b=50

and a=180-50=130