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Phổ biến 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.

Lời Giải

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 .

Lời Giải

Lily^{'} s age is : 4

Bill^{'} s age is : 16

Các bước giải pháp

Translate the problem into an equation:

4 x + 2 = 9 (x - 2)

Giải

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

Tìm age

Lily^{'} s age is : 4

Bill^{'} s age is : 16

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