shuxue ·············1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （ ）本,七二班分到（ ）

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shuxue ·············1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （ ）本,七二班分到（ ）
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shuxue ·············1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （ ）本,七二班分到（ ）
shuxue ·············
1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （ ）本,七二班分到（ ）本,七三班分到（ ）本.
2.庞贝是意大利的一座古城,它位于维苏威火山附近,它全盛时期将到火山爆发将其湮没.正好是横跨公元前后相同的年数.起先人们并不清楚这样一座古城,在挖掘的那年,人们才发现庞贝古城已被火山湮没了整整1669年之久,而挖掘工作前后也持续212年之久,到挖掘工作结束后,证实与庞贝全盛时期的最繁华时已相距2039年.庞贝古城全盛时期大约在那一年?火山爆发将它湮没又是那一年?挖掘工作是从哪一年开始的,于那一年结束?
用方程解.

shuxue ·············1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （ ）本,七二班分到（ ）
1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （37）本,七二班分到（39）本,七三班分到（78）本.

1.
设七(2)班分到x本.则七(1)班分到(150-3x)本,七(3)班分到2x本.
x-(150-3x)=2
4x-150=2
4x=152
x=38
38+2=40(本)
38*2=76(本)

shuxue ·············1.希望小学将150本书分配给七年级的三个班.七(1)班先拿,七二班分的剩下的1/3,其余给七(3)班,若七二班分到的书比七一班多2本.则七一班分到 （ ）本,七二班分到（ ） shuxue题 shuxue:1+1? ···· · · · ···· ·········· ·········· 求··············· 什么植物有应激性只要植物名 ········································································································· 急·························· 急 ··············急············ 这是什么蛾类昆虫?如题请给予回答··········································································· 写一个关于动物的拟人句急急急呀······································································································ 怎样计算摩尔质量?要详细啊························································· 是正确答案,希望!急需·······································································我涨加了，快······························