（1）x-89=36.2

             x=125.2

 （2）x÷1.3= 4.7

                 x=6.11

 （3）29x+4.3=7.2

                29x=2.9

                    x=0.1

（4）6x+3×8=90

            6x+24=90

                  6x=66

                    x=11（5）0.5（x-1.2）=2

                    x-1.2= 4

                          x=5.2

 （6）65x÷（2.8+2.2）=15.6

                         65x÷5=15.6

                               65x=78

                                  x=1.2