Question

Subtract. (− 3 f + 9) − (9 − 3 f)

Answer 1

-3f+9-9+3f
-3f + 3f +9 -9
0

Answer 2

Step-by-step explanation:\

first open the brackets

-3f + 9 - 9 -3f

collect like terms

-3f -3f +9 -9

-6f + 0

here you go :)