If you mean 7=v/-3.
Use the = as a barrier, if you move -3 to the other side it becomes +3. The basic rule is whatever you do to one side you must do to the other. For example:
7=v/-3
7x3=v
On the right side -3 has been taken away. Also v was dividing by -3.
So on the left side it becomes a positive number +3(usually written as 3). It also becomes a multiplication as this is the opposite of the division
Then you need to do that calculation-
7x3=v
21=V
so V is 21.
-7
-7
-7
v equals five
27
198
It is an equation and the value of v is 18
8
7 - ( 3 รท v )
8
7 minus the product of v and 3
v = 8