Answer:
k=2.57
Explanation:
Okay so first things first we have to eliminate 3.1 so we can get the variable k by itself.
3.1+k=5.67
-3.1 -3.1
k=2.57
Just in case if you're confused we have to isolate thats why we were subtracting both sides by 3.1
(Hope you find this helpful ;w;)