（1）8x-3+3x+1=7x+6-6x

                    10x=8

                        x=0.8

 （2）0.4（x-0.2）+1.5=0.7x-0.38

              0.4x-0.08+1.5=0.7x-0.38

                             0.3x=1.8

                                  x=6

（3）4（2x-1）-2（x+1）=24

                                 6x-6=24

                                      x=5（4）x÷2=（3x-10）÷5

             5x=6x-20

               x=20