The result is x = a / (2 * (1 - P/Q)) and a= x(P−2Q(x−a))/P+2
a.
In the rearranged formula x= a/2(1− P/Q), the expression 1− P/Q represents the scaling factor, adjusting the impact of a on the value of x. As P and Q change, the denominator 2(1− P/Q) adapts, influencing the relationship between x and a. If P is significantly smaller than Q, the scaling factor approaches 1, and a has a more pronounced effect on x. Conversely, if P is close to Q, the scaling factor approaches 0, diminishing a's influence.
Step 1: Clear the fractions
P(x−a)=Q⋅2
(x−a)+a.2

Step 2: Simplify
Px−Pa=2Q
(x−a)+2a

Step 3: Isolate the terms
Px−2Q
(x−a)=Pa+2a

Step 4: Solve for x and a
x(P−2Q(x−a))=a(P+2
a)
Solving for x:
x= a(P+2
a)/P−2Q(x−a)
Solving for a:
a= x(P−2Q(x−a))/P+2
a