Answer
$(-∞,-4]$
Work Step by Step
We are given that $9x+8\leq6x-4$.
In order to solve for x, first subtract 6x from both sides.
$3x+8\leq-4$
Subtract 8 from both sides.
$3x\leq-12$
Divide both sides by 3.
$x\leq-4$
Therefore, the solution set consists of all values of x that are less than or equal to -4.