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Phổ biến Word Problems >

Six years ago, Sally was 12 years younger than thrice her sister's age. How old is Sally if she is twice as old as her sister now?

Lời Giải

S i x ye a rs a g o, S a ll y w a s 12 ye a rs yo u n g er t han t h r i ce h er s i s t e r^{'} s a g e . Ho w o l d i s S a ll y i f s h e i s tw i ce a s o l d a s h er s i s t er n o w ?

Lời Giải

Sally^{'} s age is : 48

Các bước giải pháp

Translate the problem into an equation:

2 x - 6 + 12 = 3 (x - 6)

Giải

x, 2 x - 6 + 12 = 3 (x - 6) : x = 24

Tìm Sally's age

: 48

Sally^{'} s age is : 48

Ví dụ phổ biến

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