[ س - 3 ] / [ س +1 ] = 5/6
الحل يعتمد على:
1) [ س + أ ] = [ س ] + أ لكل أ عدد صحيح
2) [ س ] = أ -------> أ <html><applet archive = "formula.jar" codebase = "." code = "formula.FormulaViewApplet.class" name = "FormulaViewApplet" width = "12" height = "15" hspace = "0" vspace = "0" align = "middle"><param name = "FORMULA_CODE" value = "SYMBOL_37"></applet></html> س < أ + 1
الآن بضرب الطرفين :
6 [ س - 3 ] = 5 [ س + 1 ]
6 ( [س] - 3 ) = 5( [س] + 1 )
6[س] - 18 = 5[س] + 5
6[س] - 5[س] = 5 + 18
[س] = 23
23 <html><applet archive = "formula.jar" codebase = "." code = "formula.FormulaViewApplet.class" name = "FormulaViewApplet" width = "12" height = "15" hspace = "0" vspace = "0" align = "middle"><param name = "FORMULA_CODE" value = "SYMBOL_37"></applet></html>س < 24