Question

9. 21 - 3(b - 7) = b + 20​

Answer 1

Answer:

hope this will help you.....

Answer 2

11/2

Step-by-step explanation:

21 - 3(b - 7) = b + 20

21 - 3b + 21 = b + 20

42 - 20 = b + 3b

4b = 22

b = 22/4 = 11/2

b = 11/2