（1）x÷8=0.06

              x=0.48

  （2）1.26-2x=0.74

                2x=0.52

                  x=0.26

（3）1.8÷x=7.5

                 x=0.24

（4）1.3x+1.5x=0.14

                 2.8x=0.14

                     x=0.05（5）x-0.25x=2.8+0.2

            0.75x=6

                  x= 4（6）7x-3x+0.04=0.4

                      4x=0.36

                        x=0.09