A3 For which value of the variable $x$ do the expressions $x \cdot \frac{1}{2}$ and $x-\frac{1}{2}$ have the same value?
(A) -2
(B) -1
(C) 0
(D) 1
(E) 2
A3. We equate the expression: $x \cdot \frac{1}{2}=x-\frac{1}{2}$ and solve the equation. The unknown $x=1$.