Question

Find the value of b if the following figures are similar.​

Answer 1

b = 15 - (20 - 12)
b = 15 - 8
b = 7

Answer 2

7

Explanation:

20 - 12 = 8

15 - b = 8

-b = 8 - 15

b = 7 ( -ve signs will become +ve)