Question

please tell the answer​

Answer 1

2a + 5b = 180 (linear pair)

2(40) + 5b = 180 (Given :- a = 40)

80 + 5b = 180

5b = 100

b = 100/5 = 20

b = 20

Answer 2

Answer:

if a=40

40 by 2 =80

If a linear pair forms 180 then

80 -180 =100

5b=100

b=100/5

b=20