x-0.4x=2.4解:(1-0.4)x=2.4 0.6x=2.4 x=2.4÷0.6 x=4
1X-2x等于0.6X0.6X等于2.4两边同除以0.6等于4
0.6x=2.4 x=4
(1-0.4)x=2.40.6x=2.4x=2.4/0.6x=4