验算360÷{4X(1.25+1)}X1.25=50正确
360÷[4×(1.25+X)]×1.25=50360×1.25=50×4×(1.25+x)450=250+200x200x=200x=1
5+5x=360÷(50÷1.25)5+5x=95x=9-5x=4/5