HELP ME PLZ *
1. 2 times x is subtracted from 200.the difference is then increased by 20%. If the overall reslt is equal to decreasing x by 40%, find x.(Answers: 80)
2. a shirt is sold for $270,and the profit percent is 25%.If the shirt is sold for $300, what is the profit?(Answers: $84)
我要式同過程,我天日要交,快d教我
MATHS*percentages (有interest)
2006-11-13 2:30 am
回答 (2)
2006-11-13 2:38 am
✔ 最佳答案
1. (200-2x)(1+20%)=x(1-40%)200-2x=0.5x
x=80
2.The profit
=$(300-270除(1-25%))
=$(300-216)
=$84
2006-11-13 2:45 am
1.（200-2x)(1+20%)=x(1-40%)
＝１９８ｘｘ１２０%＝ｘ６０
＝２３７,６=x60%
=142.56
==================================================
2.300-270除１－２５%
３０除７５%
－－－
１００
＝２２.５
＝１９８ｘｘ１２０%＝ｘ６０
＝２３７,６=x60%
=142.56
==================================================
2.300-270除１－２５%
３０除７５%
－－－
１００
＝２２.５
收錄日期: 2021-04-12 22:05:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061112000051KK04295