Question

Which one of these equations is correctly written in Standard Form?

x + y = −4

3x + 2.5y = −4

x + 3y = −12

−3x + y = −12

Answer 1

In the general (or standard) form the linear equation is written as:
Ax + By = C or
Ax + By + C = 0
where A ≠0 and B ≠0