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人気のある Word Problems >

簡約 Nine years ago, Jareth was five times as old as Dave. Now, he is only three times as old as Dave. Find their present ages.

解

s im pl i f y N in e ye a rs a g o, J a re t h w a s f i v e t im es a s o l d a s D a v e . N o w, h e i s o n l y t h ree t im es a s o l d a s D a v e . F in d t h e i r p rese n t a g es .

解

Dave^{'} s age is : 18

Jareth^{'} s age is : 54

解答ステップ

Translate the problem into an equation:

3 x - 9 = 5 (x - 9)

x

を解く

3 x - 9 = 5 (x - 9) : x = 18

発見する age

Dave^{'} s age is : 18

Jareth^{'} s age is : 54

人気の例

Melvin is 18 years older than his daughter, Melly. Eight years ago, he was 7 times as old as his daughter. Find the present age of Melly.Andrei is 6 years older than his sister Andrea. After 10 years, the sum of their ages will be 50. How old is Andrea?Carmen is 9 years older than David. Seven years ago, the sum of their ages was 25. How old are they now?Carmen is 5 years older than David. A year ago, the sum of their ages was 13. How old are they now?Jordan is 2 years older than Maggie. In 3 years the sum of their ages will be 62. How old is Jordan now?