Question

Is 5f + 4 -3f -2 = 2f -2

Answer 1

combine like terms on left side:

(5f-3f)+(4-2)=2f-2

2f+2=2f-2  subtract 2 from both sides

2f=2f-4  subtract 2f from both sides

0=-4

Since the above in not true, 

5f+4-3f-2 does not equal 2f-2 for any value of f....