The letter X in braille
dots 1-3-4-624 of 26⠭
X in braille is dots 1-3-4-6. X is C plus dots 3 and 6.
A capital X has the capital sign, dot 6, in the cell before it: ⠠⠭.
In Grade 2 (contracted) braille, x standing alone as a word means “it”.
Don't mix it up
Now write it yourself
Tap the dots for X, then Enter. On a keyboard, press F D S / J K L together and let go.
Remember it, don't just look it up
X is in Letters U–Z. Braille a Day brings it back tomorrow to answer from memory, then again just before you'd forget. Five minutes a day.