Question

please find the answer of this question ​

Answer 1

b+b+1+b+2=84

3b+3=84

3b=84-3

3b=81

b=81/3

b=27 is ur ans

Answer 2

3b+3/4=21

3b+3=84

3b=84-3

3b=81

b=81/3=27