(a+300)÷a=2.5 求a?
回答 (3)
2021-01-19 7:19 pm
(a+300)÷a=2.5 --> (a÷a)+(300÷a)=2.5 --> 1+(300÷a)=2.5 -->300÷a=2.5-1 =1.5=3/2 --> a/300 = 2/3 -->a=200 ..ans
2021-01-20 8:40 pm
(a+300)÷a=2.5
a+300=2.5a
1.5a=300
a=200
a+300=2.5a
1.5a=300
a=200
收錄日期: 2021-04-11 23:23:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210119103632AAT1Gov