学校组织植树节种树活动，要求每个年级的学生都参加，男生每人种6棵，女生每2人种5棵。在四（1）班4 女生1人种2.5棵假设全是男生女生=（40×6-184）÷（6-2.5）56÷3.52×56÷72×816（人）男生=40-16=24（人）
3月12日式植树节，学校组织全校同学参加植树活动，计划植树1600棵，每个班植树的棵树相同. 这个学校共有x个班级1600/x+10=1600/(x-8)x=40或x=-32(舍去）这个学校共有40个班级
把下面这篇汉语译为英语 翻译如下：NoticeThe 12th of March is Arbor Day.The Student Union will organize all the students to participate the activity of tree planting.All the students shall meeting in the school playground at 7：00 on the morning of March 12th.We will go to the Xishang Mountains to plant trees.Everyone shall join and each class brings 5 to 6 basin for watering the trees.
