Step 1 :Given functions: $g(x)=4 x+\frac{1}{2}$ and $h(x)=2-x$. We need to find $(g-h)(x)$
Step 2 :Subtract h(x) from g(x): $(g-h)(x) = g(x) - h(x)$
Step 3 :Substitute the given functions: $(g-h)(x) = (4x + \frac{1}{2}) - (2 - x)$
Step 4 :Simplify the expression: $(g-h)(x) = 5x - 1.5$
Step 5 :\(\boxed{(g-h)(x) = 5x - 1.5}\)