Is there more information for this question? It seems like you forgot something.
Answer: -18=v
Step-by-step explanation: You subtract 8 from both sides. -10-8=-18 which will equal to v.
I believe it is 5 I have the work in the picture
1. Subtract x+7. x = 2
2. Subtract x+7. x = 8
3. Subtract x+3. x = 4
4. Subtract x+1, divide by 2. x = 9
5. Subtract x+1. x = 8
6. Subtract 2x+2. x = 3
7. Subtract x+3, divide by 3. x = 6