Answer:
-13=k
Step-by-step explanation:
-10k+1=40-7k
Add 10k to both sides
-10k+10k+1=40-7k+10k
1=40+3k
Subtract 40 from both sides,
1-40=40-40+3k
-39=3k
Divide by 3 on both sides,
-13=k
Hope this helps!
(Please use this to help you instead of just looking up answers!)
