Ann's pocket money is 5times that of Mary's .After giving $10 to Mary, Ann's pocket money becomes 3 times that of Mary's .Fing the original amount of Ann's pocket money.
Let the original amount of Ann's pocket money be$x.
解數學方程！（１０分）十分急
2006-10-30 8:33 pm
回答 (2)
2006-10-30 9:01 pm
✔ 最佳答案
Let Ann have pocket money $x, Mary have pocket money $x/5x-10=3(x/5)
x-10=3x/5
5x-50=3x
2x=50
x=25
the original pocket money of Ann= $25.
whereas the original pocket money of Mary=$5
2006-10-30 8:53 pm
X - 10 = 3/5 X
X= 25
X= 25
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