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人気のある Word Problems >

Bill is four times as old as Lily. Two years from now, Bill will be nine times as old as Lily was two years ago. Find their present ages.

解

B i ll i s f o u r t im es a s o l d a s L i l y . Tw o ye a rs f ro m n o w, B i ll w i ll b e nin e t im es a s o l d a s L i l y w a s tw o ye a rs a g o . F in d t h e i r p rese n t a g es .

解

Lily^{'} s age is : 4

Bill^{'} s age is : 16

解答ステップ

Translate the problem into an equation:

4 x + 2 = 9 (x - 2)

x

を解く

4 x + 2 = 9 (x - 2) : x = 4

発見する age

Lily^{'} s age is : 4

Bill^{'} s age is : 16

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