Question

21-3(b-7)=b+20 solve this problem please​

Answer 1

Answer:

b=11/2

Step-by-step explanation:

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

⇒21-3b+21=b+20

⇒-3b-b=20-42

⇒-4b=-22

⇒b=11/2