SOLUTION: This problem is giving me trouble. I can simplify but can't figure out how to flip the bottom to cancel out. 7k - 21 7(k - 3) -------- ---------- 9 - 3k

Algebra ->  Expressions-with-variables -> SOLUTION: This problem is giving me trouble. I can simplify but can't figure out how to flip the bottom to cancel out. 7k - 21 7(k - 3) -------- ---------- 9 - 3k      Log On


   

Question 429469: This problem is giving me trouble. I can simplify but can't figure out how to flip the bottom to cancel out.

7k - 21 7(k - 3)
-------- ----------
9 - 3k 3(3 - k)
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

7k - 21
--------
9 - 3k


7(k - 3)
--------
3(3 - k )



-7(3 - k)
--------
3(3 - k )

now, cancel (3-k)

answer: -7/3