8.5 +4(1-2.5k) = -24.5
Use distributive property
8.5 + 4 - 10k = -24.5
Add 4 to 8.5
12.5 - 10k = 24.5
Subtract 12.5 from both sides
-10k = 12
Divide -10 on both sides
Final Answer: -12/10 or -1 2/10 or -1 1/5 *All answers are equivalent to each other.