就係呢題:
In a supermarket,there are 96 packs of sali with a total weight of 78kg.
Some packs of salt hold 1.5kg while others hold 0.5kg.How many 1.5kg packs are there?
thx!!!
有冇人幫我做呢條中一數學題?10點!!!
2009-01-04 4:49 am
回答 (1)
2009-01-04 6:15 am
✔ 最佳答案
Let x be the number 1.5kg packs of salt,then 96-x be the number 0.5kg packs of salt.
1.5x+0.5(96-x)=78
1.5x+48-0.5x=78
x=30
∴ there are 1.5kg packs of salt.
收錄日期: 2021-04-23 20:41:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090103000051KK01956