Ax + By = CIn the above syntax, A, B and C are to be numbers, that is, when you write the equation of a straight line, there will be positive or negative numbers (or zero) in place of A, B and C. Note that A should not be negative in the above form, and if it is negative, the equation is multiplied by -1.

Examples of some equations in standard form:

- 3x - y = -2
- x + y = 1