呢條數點計啊？

圖片參考：http://imgcld.yimg.com/8/n/HA06399860/o/701007180143113873370500.jpg

~~希望可以幫到你~~

呢條數點計啊？y + 3y/4 = 210
y+0.75y=210
1.75y....=210
y..........=120

2010-07-18 21:37:14 補充：
4(y + (3y/4 ))=210*4
4y+3y..........=840
7y................=840
y..................=120

_________________
Both of the answers are correct

y + 3y/4 = 210
7y/4 = 210
y/4=30
y=120

y + 3y/4 = 210

4y+3y = 210*4

y(4+3)=840

y=840/(4+3)

y=120

2010-07-18 21:07:01 補充：
樓上的
你錯左啦
第二步3y/4*4既時候
前面個y都要*4

y + 3y/4 = 210

Y+3Y/4 x4=210x4

y+3y=840

y+3y/3=210/3

y=70



我唔知對不對!!