Answer:
k = -7
Explanation:
Let's put the side with the variables on the left.
-k+16-2k-9=28
Now we need to isolate the variable, which is k in this case.
>> Isolating the variable <<
Step 1: Simplify as much as you can.
-k+16-2k-9=28
-k-2k+16-9=28
-3k+7=28
Step 2: Subtract 6 from both sides
(-3k+5) -7 = 28 -7
-3k = 21
Step 3: divide both sides by -3
k = -21/3
That's your answer:
k = -7