Im not understanding how to start this can someone help me Plz

Multiply both sides by the common denominator:  12k

 

(-11/k) · (12k)  =  (3/12) · (12k)

 

On the left-hand side, the k factor cancels; while on the right-hand side the 12 cancels:

 

(-11)(12)  =  3k

 

Then, finish.