Question

Make extra subject of the formula x (a - b)=a ( b - x)

Answer 1

Given formula: x(a - b) = a(b - x)

Let's consider a new variable y such that y = a - x

Now we rewrite the formula using the new variable y:

x*y = -y*b

This shows us a different way of expressing the original formula with the introduction of the new variable y.