Question

in the given figure, a = 30°. The value of b is

Answer 1

Answer:

24°

Step-by-step explanation:

5b+2a=180

5b=180-2×30

b=120/5=24°

Answer 2

Since both the angles are on a straight line

$5b + 2a = 180$

Since a = 30°

$5b + 2(30) = 180 \\ 5b = 180 - 60 \\ 5b = 120 \\ b = \frac{120}{5 } \\ b = 24$