Answer: Value of k must be 40.
Step-by-step explanation:
Since we have given that
28 is 12 less than k
1) 12 less than k means
[tex]k-12[/tex]
As we use "Subtraction" for less than purpose.
2) For "is" we would use "Equality":
So, our final equation becomes
[tex]k-12=28\\\\k=28+12\\\\k=40[/tex]
Hence, Value of k must be 40.
