It equals 276 but about 300
Absolute value represents distance. Distances can't be negative.
So it's impossible to have |3-w| be some negative value.
Which is why

has no solutions
The exponent 4 needs to be applied to both 3 and x, so we would have:
3 * 3 * 3 * 3 * x^4.
9 * 9 * x^4.
81x^4
It must be ≤ instead of ≥.
y ≤ - 3·x + 4