30 = 6 x 5
6 = 3 x 2
8 = 4 x 2
4 x 2 + 3 x 2 + 6 x 5 = 44
First you are going to solve for f.
6f = -2
you must get f alone so you divide both sides of the equation by 6 which becomes ....
f = -3
now you add the absolute value sign to -3. absolute value is how far away your answer is from 0. -3 is 3 away from zero so f = 3