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인기 있는 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.

해법

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 .

해법

Lily^{'} s age is : 4

Bill^{'} s age is : 16

솔루션 단계

Translate the problem into an equation:

4 x + 2 = 9 (x - 2)

x

해결 대상

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

age 찾다

Lily^{'} s age is : 4

Bill^{'} s age is : 16

인기 있는 예

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