第一种;设这个数为;x.
(80%-2/3)x=30
x=-225
第二种;30÷(2/3-80%)=-225
答;这个数为-225.
猜你喜欢
- 1新华字典 正文按音序排列.“指” “脂” “诣”,在字典中的位置是()在首,()在中,()在后;“盖世无双”四个字的先后顺序是()
- 2关于lewis酸碱理论
- 3The girl () her is lucy
- 4Many people believe that the problems between the two countries should be dealt with_______(peace)
- 5六年级有学生160人,已达到国家体育锻炼标准的有120人.六年级学生的体育达标率是多少?是多少?
- 6恐龙是什么生动物
- 7She is getting on well with her classmates.(对 well 划线提问)
- 8食用油可以达到多少温度,谢谢
- 9一根绳子长7米,这根绳子围一棵大树绕了2圈还余下0.72米.这根大树的横截面面积是多少平方米?
- 10英译汉:They had grounded him beneath their heal,they had taken the best of him,they……