Question 105517
The answer is a).

a)
3w+6-w=4w-2(w-3)  get rid of parens
3w+6-w=4w-2w+6  collect like terms on each side of the equation
2w+6=2w+6---------------this is an identity---true for all values of w

b)
8-(5v+4)=-5v-4  get rid of parens
8-5v-4=-5v-4  collect like terms on each side of the equation
-5v+4=-5v-4
This problem does not have a solution.  There are no values for v that will satisfy this equation.

c)
5y+7=5y-7 
This problem does not have a solution.  There are no values for y that will satisfy this equation. 

d) 
4m-6=5m+9-m  collect like terms on each side of the equation
4m-6=4m+9
This problem does not have a solution.  There are no values for m that will satisfy this equation. 

Hope this helps---ptaylor