Answer:
a=-6
Explanation:
In order to solve for a, we must isolate a on one side of the equation.

2 is being multiplied by (a+5). The inverse of multiplication is division. Divide both sides of the equation by 2.



5 is being added to a. The inverse of addition is subtraction. Subtract 5 from both sides of the equation.



Let's check our solution. Plug -6 in for a and solve.




This checks out, so we know our solution is correct.
The solution to the equation 2(a+5)=-2 is a=-6