IN this question, it is given that
For all real numbers b and c such that the product of c and 3 is b.
That is
[tex] 3c=b [/tex]
Solving for c by dividing both sides by 3
[tex] c = \frac{b}{3} [/tex]
And we have to find an expression , that represents the sum of c and 3 in terms of b. And sum of c and 3 is
[tex] = c+3 [/tex]
Substituting the value of c
[tex] = \frac{b}{3} +3 [/tex]
So the correct option is the last option .