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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?

Solución

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?

Solución

Sally^{'} s age is : 48

Pasos de solución

Translate the problem into an equation:

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

Resolver para

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

Hallar Sally's age

: 48

Sally^{'} s age is : 48

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