The line equation of standard form is  , where A>0 & A, B,C are integers.

                   (Substitute and)

                         (Product of two same signs is positive)

                         (Subtract: )

                               (Add: )

                                          (Divide: )

For the Line equation,

Substituting Slope m   &  in point–slope form.

               (Product of two same signs is positive)    

                  (Distributive property: )

                        (Additive identity property: )

Rewriting the above equation in standard form,

             (Subtract y from both sides)     

             (Commutative property of Addition: )                         

                  (Additive inverse property: )

                        (Additive identity property: )

The line equation in standard form is .