Question

Calculate the value of b.
(b-15)
3b°
(2b + 45°
Diagram not drawn accurately​

Answer 1

b = 30

Explanation:

The sum of the 2 angles above the line will equal the angle below the line

3b + b - 15 = 2b + 45

4b - 15 = 2b + 45 ( subtract 2b from both sides )

2b - 15 = 45 ( add 15 to both sides )

2b = 60 ( divide both sides by 2 )

b = 30