Question

30 points.Please help with explanation.

Answer 1

given that , b=2/3c.

c =2/3d

substitute c in b = 2/3 C

b =2/3(2/3d)
b = 4/9d.


hope this answer is useful to you and it's clear to you dear friend.

Answer 2

4//9 is the ryt answer

c = 2/3 d
or b = 2/3 c

put the value of c in the equation b = 2/3c
then
b = 2*2/3*3 d
b = 4/9d