Question

What is 3f+3<6 or 7f-20>50

Answer 1

3f+3<6  

(First get all the constants on one side and the variables on the other side.)

3f+3<6
    -3 -3
----------
3f < 3

(Then divide by the number with the variable to isolate it.)

3f < 3
---   --
3     3

f < 1

It would be the same for this one also:

7f-20>50
   +20 +20
________
7f > 70
--     ---
7      7

f > 10