Question 13370
First open all the brackets (BODMAS)
You will have   2k-24+12k = 2k-6+3
Arrange the same terms together(e.g 2k+3k)
Now you will have  2k-2k+12k = 24-6=3
Cancel +2k with -2k
You will have 12k = 24-6+3
              12k = 18+3
              12k = 21
Divide 21 by 12
                k =(21/12)