（1）12×6+8x=120

              96+8x=120

                   8x=24

                     x=3（2）4x+2x=1.08

              6x=1.08

                x=0.18

（3）39÷（5+x）=0.1

                       5+x=390

                           x=385

 （4）1.5×2.5-2x=1.5

               3.75-2x=1.5

                       2x=2.25

                         x=1.125