i need to solve this formula for the specified variable of s.

c = (1/3)f(s + k)

First, multiply both sides of the equation by 3 to get rid of the leading coefficient, (1/3), on the right-hand side of the equation:

3·(c) = 3·((1/3)f(s + k))

3c = (3/3)f(s + k)

**3c = f(s + k)**

Divide both sides of the equation by f:

(3c)/f = (f(s + k))/f

3c/f = (f/f)(s + k)

**3c/f = s + k**

Subtract k from both sides of the equation to solve for s:

(3c/f) - k = (s + k) - k

**(****3c/f) - k = s**