The equation is .

Rewrite the equation in standard form Ax + By = C.

Apply subtraction proparty of equality: Subtract 3x from each side.

Apply commutative property of addition: .

                            (Apply Additive inverse property: )

                              (Apply Additive identity property: )

                 (Multiply each side by negative one)

                                  (Product of two same signs is positive)

Compare the equation with standard form to find the values A, B and C.

The equation in standard form is . .