等式俩边同时除以(1-25%)然后化简之后得到210(EBIT-140-150)=410(EBIT-140-345-30)化简:21(EBIT-290)=41(EBIT-515)化简:21EBIT-21×290=41EBIT-41×51520EBIT=41×515-21×290俩边同时除以20EBIT=2.05×515-21×14.5EBIT=1055.75-304.5EBIT=751.25