装修问答

答

解得:1px solid black"> 1 18 （x+3）+

设甲工程队先做3周后还需x周完成:middle" cellpadding="-1" cellspacing="-1">

1

18

×9= 1

2

:middle" cellpadding="-1" cellspacing="-1"> 1 12 ×6= 1

12

x=1:inline-table:middle" cellpadding="-1" cellspacing="-1"> 1 2