Answer
$\dfrac{1}{2}(12x-4)-(x+5)=5x-7$
Work Step by Step
$\dfrac{1}{2}(12x-4)-(x+5)$
Multiply $\dfrac{1}{2}$ by every term inside the first parentheses and change the sign of every term inside the second parentheses:
$\dfrac{1}{2}(12x-4)-(x+5)=6x-2-x-5=...$
Simplify like terms:
$...=5x-7$