Question 795128
5x + 4 >= 4x + 5
5x - 4x + 4 - 4 >= 4x - 4x + 5 - 4
5x - 4x >= 5 - 4
x >= 1

check:
5(1) + 4 = 4(1) + 5
5 + 4 >= 4 + 5
9 >= 9