2(3x减l)=7(x减2)加3解：6x-2=7x-14+3 7x-6x=14-3-2 x=9
6x-2=7x-14+3=7x-11x=11-2=9
看
2(3x减l)=7(x减2)加36x-2=7x-14+3x=9
2（3x-1）=7（x-2）+3，6x-2=7x-14+3，7x-6x=14-3-2，x=9
