Equations with polynomial expressions

how do solve -2(w+1)+w=7-4w

                     = -2w -2 +w = 7-4w

                     = -w -2 = 7-4w            Now, add 4w to both sides

                         3w-2 = 7                  Now add 2 to both sides

                          3w=9                   Now divide by 3

                            w=3