3x-2=5x+6．
移项，得3x-5x=6+2，
合并，得-2x=8，
化系数为1，得x=-4．
His shoes are ___dirty ____he has to wash them .
A.too, to B.so, that C.enough, that
在水中不溶但可膨胀的分离材料是
A．葡聚糖凝胶B．氧化铝C．硅胶D．透析膜E．活性炭
