Linear Equation in One Variable
If there is only one variable in the equation then it is called a linear equation in one variable.
The general form is
ax + b = c,
Where a, b and c are real numbers and a ≠ 0.
x + 5 = 10
y – 3 = 19
These are called linear equations in one variable because the highest degree of the variable is one and there is only one variable.