what does 4(x-1)≤4x equal

4(x-1)≤4x   simplify on the left

4x - 4 ≤ 4x  subtract 4x from both sides

-4 ≤ 0       

This answer may be puzzling....but notice.......since this answer is always true.....then, we have an identity and any real number value of x will solve the inequality

Here's the graph of both sides......https://www.desmos.com/calculator/dqi09zvhu3

And notice that the graph of 4x is greater than the graph of 4(x -1) for all real numbers...