14 is always 15 is sometimes 16 is sometimes
4/10 is 2/5 or 0.4 in decimal form.
Here are the 4 inequality signs.

---> a is less than b

---> a is less than or equal to b

---> a is greater than b

---> a is greater than or equal to b
For the second and fourth lines above, the two sides may or may not be equal.
For the first and third lines above, the two sides cannot be equal.
X+5=9
subtract 5 from each side
x=4