x-1/4-(2/5x-7)=35解:去括号,得x-1/4-2/5 x+7=35合并同类项,得3/5 x+27/4=35系数化为1,得3/5 x=113/4x=47.083.....
x-1/4-(2/5ⅹ-7)=35去括号移项合并同类项3/5ⅹ=28.25两边同除ⅹ=141.25/3
x-860=260x-35259x=-825x=-3.19