數學方程(help me!!)

2011-02-09 2:33 am
y(1-21%)=237




請大家教下我吧!!!
更新1:

要完整一部一部來做!THX

更新2:

幫忙驗算THX!

回答 (4)

2011-02-09 2:41 am
✔ 最佳答案
y (1 - 21%) = 237
y (100% - 21%) = 237
y (79%) = 237
y * 0.79 = 237
y = 237 / 0.79
y = 300

Hope can help u...^^
參考: Self...^^
2011-02-09 11:21 pm
y(1-21%)=237

y*79%=237

y=237/79%

y=300


300(1-21%)=237

2011-02-09 16:18:13 補充:
* ←是乘號
2011-02-09 2:41 am
so easy
我form1都識a0a

y(1-21%)=237
79%y=237
y=237除79%
y=237x100/79
y=3x100/1
y=300
2011-02-09 2:41 am
y×(100%-21%)=237
y×79%=237
y×79/100=237
y=237*100/79
y=3*100(約簡)
y=300
參考: 我


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