In Roman numerals, x equals ten.

X is in math.

X is an arbitrary number, which can directly enter the original equation.

Like y, he can represent all the numbers.

One-dimensional linear equation. There is only one unknown called a linear equation.

Such as x+3=4 and j+6=9.

There are only two unknowns called binary linear equations.

For example, z+B+ 16=45, and x+y+2=6.

The ternary linear equation is called ternary linear equation.

Such as Z+Y+X+45=234.

Yuan refers to how many unknowns there are, and the number represents a series of formulas. If there is a quadratic equation with three variables, it represents two series.