2分之x+3=x减6分之x减1 3(x+3)=6x-x+13x+9=5x+13x-5x=1-9-2x=-8x=4 1减6分之2x减5=4分之3减x12-2(2x-5)=3(3-x)12-4x+10=9-3x-4x+3x=9-22-x=-13x=13 6+2（x减3）=x6+2x-6=x2x-x=0x=0
题目表达的不明确啊
a,zenmezhizhezhongtimu
