Answer: 
The value of v in -18 = 5v+7 is -5. 
Solution: 
From question given that the equation is 
-18 = 5v + 7 
On subtracting 7 both sides, the above equation becomes 
-18 - 7 = 5v + 7 - 7 
-18 - 7 = 5v 
Taking -1 as a common term in left hand side, 
-(18+7) = 5v 
On simplifying the above equation, 
-(25) = 5v 
Open the bracket, 
-25 = 5v 
Rewrite the above equation, 
5v = -25 
On dividing by 5 on both sides 
v = -5 
Hence on Simplifying the given equation -18 = 5v + 7, we get value of v is -5.