Answer :

Answer:

f = S + 6c - 8r /5

Step-by-step explanation:

When  the question asks you to make f the subject it means that it wants us to show what f is equal to.  So the end of our answer should start like this:

f  =

So we want f by itself. Let's first remove the negatives in this question.

To  do this we need to add 6x on both sides.

This gives us:

S + 6c = 5f + 8r

Now we want to take away 8r from S + 6c

This gives us=

S + 6c - 8r =5f

All that is left to do is to divide the left side by  5 because we want f left by itself.

This leaves us with=

S + 6c - 8r /5 = f

Remember that if you're writing this out that you are dividing ALL of the left side by 5 and not just the last few numbers if the left side

So the end result is

f= S + 6c - 8r /5