Question

Combine like terms.9 + 18s – 7s A. 20s B. 9 + 11s C. 9 – 11s D. 20

Answer 1

9+18s-7s the common factor is 's' so : s(18-7) + 9 and that is : 11s+9 The answer is B.

Answer 2

As 9+18s-7s
   =9+11s
As 9+18s-7s=9+11s
9+18s-7 is Option "B"....

Hope this may help u!!!!