Question

why do they use letters instead of a box !!are they just trying to confuse people!! lol??

Answer 1

Because in more advanced mathematics, sometimes you're dealing with more than a single variable. As a side effect, textbooks were written with x's, and for those of us who go on to study mathematics, seeing the x's lets us get used to it.

Answer 2

oh! that makes more seance! XD

Answer 3

sorry i spelled that wrong sense*

Answer 4

thanks!

Answer 5

You're welcome.