Maths問題
2006-10-30 9:28 pm
Mary is X years old , her brother Tom is 4 years older than she . Their father is 3 times as old as Tom . Express the age of their father in the simplest algebraic expression.ma
回答 (2)
2006-10-30 11:38 pm
✔ 最佳答案
Given : Mary is X years old, and Tom is 4 years older than her, so Tom’s age= X+4
Since their father is 3 times as old as Tom. Now, let his age is Y. Then,
Y = 3*(X+4)
=3X+12
Therefore, their father is (3X+12) years old.
2006-10-30 9:32 pm
Mary's age = X
Tom's age = 4+X
∴their father's age = 3(4+ X)
ˉˉˉˉˉˉˉˉˉ=12+3X
Tom's age = 4+X
∴their father's age = 3(4+ X)
ˉˉˉˉˉˉˉˉˉ=12+3X
收錄日期: 2021-04-23 22:11:22
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