Redo the second problem: 3-4x≥-2, first subtract 3: 3-3-4x≥-5 = -4x≥-5

then, divide by NEGATIVE 4 = 5/4≤ x (or you could say x≥5/4). The reason the sign changed is because you divided by a NEGATIVE number. Any time you divide by a negative number, the direction of the sign changes.