Answer:
s = n(c - d)
or s = c - dn
see below
Step-by-step explanation:
Assuming this is the problem, which is what you wrote.
[tex] d = c - \dfrac{s}{n} [/tex]
d = c - s/n
Switch sides.
c - s/n = d
Subtract c from both sides.
-s/n = d - c
Multiply both sides by -n.
s = n(c - d)
If the problem is this:
[tex] d = \dfrac{c - s}{n} [/tex]
then the solution is:
d = (c - s)/n
Switch sides:
(c - s)/n = d
Multiply both sides by n.
c - s = dn
Subtract c from both sides.
-s = dn - c
Multiply both sides by -1.
s = c - dn
