（1）x×4.32=6.48

                  x=1.5

  （2）2x÷40=2.25

                2x=90

                  x= 45

（3）7.2x-2x= 41.6

             5.2x= 41.6

                 x=8（4）2.7÷3+3x=9.9

              0.9+3x=9.9

                      x=3

（5）0.6×（x-8）=9.6

                       x-8=16

                          x=24