-[-(-k)] -(-2)(-2 + k) = -k - (4k + 3)

Answer 1

so many unnecessary negatives....

-[-(-k)] -(-2)(-2 + k) = -k - (4k + 3)
-k + 2(-2+k) = -k - 4k - 3
-k - 4 + 2k = -5k - 3
k + 5k = -3+4
6k = 1
k = 1/6