A) The given equation is expressed as
2(x + a) = 4b
To solve for a, the first step is to divide both sides of the equation by 2. It becomes
2(x + a)/2 = 4b/2
x + a = 2b
We would subtract x from both sides of the equation. It becomes
x - x + a = 2b - x
a = 2b - x
B) The processes used include division which was followed by subtraction