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受欢迎的 Word Problems >

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

解答

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

解答

Sally^{'} s age is : 12 \frac{12}{121}

求解步骤

Translate the problem into an equation:

2 x - 6 = 123 (x - 6)

求解

x, 2 x - 6 = 123 (x - 6) : x = \frac{732}{121}

找到 Sally's age

: 12 \frac{12}{121}

Sally^{'} s age is : 12 \frac{12}{121}

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