-3,8k-k+3,8k+k

To simplify the expression \(-3.8k - k + 3.8k + k\), we can combine like terms.

1. Group the terms with \(k\):

   • \(-3.8k\) and \(3.8k\) are like terms.
   • \(-k\) and \(k\) are also like terms.

2. Now, combine them:

   • \(-3.8k + 3.8k = 0\)
   • \(-k + k = 0\)

So the expression simplifies to:

\[ 0 + 0 = 0 \]

The final result is \(0\).