Answer:
-4
Step-by-step explanation:
-k + 8(2k - 3) = -84
Multiply 8 by 2k - 3
-k + 16k - 24 = -84
Combine like terms
15k -24 = -84
+24 +24
Add 24 to both sides
15k = -60
Divide both sides by 15
15k/15 = -60/15
k = -4