Verified answer

Answer:

A linear equation in one variable is an equation in which there is only one variable present. It is of the form Ax + B = 0, where A and B are any two real numbers and x is an unknown variable that has only one solution.

For example, 9x + 78 = 18 is a linear equation in one variable.

Step-by-step explanation:

There are three methods used to solve systems of equations:

~Graphing, Substitution, and Elimination.