2 (2/5k + 1/6) = 3/10k + 2/3

2 (2/5k + 1/6) = 3/10k + 2/3

4/5k + 1/3 = 3/10k + 2/3 ... if u multiply everything by the common denominator, it will get rid of the fractions ... so multiply by 30. This, of course, is optional ... u can leave the fractions in if u want.

24k + 10 = 9k + 20 (result of multiplying by 30)

24k - 9k = 20 - 10

15k = 10

k = 10/15

k = 2/3 <===