Answer
all real numbers
Work Step by Step
$6w-4\leq2(3w+6)\longrightarrow$ multiply using the distributive property
$6w-4\leq6w+12\longrightarrow$ subtract 6w from each side
$6w-4-6w\leq6w+12-6w\longrightarrow$ subtract
$-4\leq12$
Since -4 is less than or equal to 12, the solution includes all real numbers.