You have the following equation
-(y + 5) = 2(3y + 1)
First of all, you eliminate parenthesis, by taking into account that a parenthesis preceded by a minus sign, demand that all sign changes into the parenthesis when you open the parenthesis, just as follow:
-y - 5 = 2(3y) + 2(1) (Furthermore, you have applied distribution property)
-y - 5 = 6y + 2 (you made the products)
Next, you rest 6y and sum 5 in bot sides of the equation and you simplify:
-y -6y -5+5 = 6y -6y +2 +5
-7y + 0 = 0 + 7
-7y = 7
Finally, you divide both sides of the equation by -7:
-7y/(-7) = 7/(-7)
y = -1
Then, the solution to the equation is y=-1