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Popular Word Problems >

Three years from now, David's age will be three times his age 12 years ago. How old was David 12 years ago?

Solución

T h ree ye a rs f ro m n o w, D a v i d^{'} s a g e w i ll b e t h ree t im es hi s a g e 12 ye a rs a g o . Ho w o l d w a s D a v i d 12 ye a rs a g o ?

Solución

Davi d^{'} s age 12 years ago : 7 \frac{1}{2}

Pasos de solución

Translate the problem into an equation:

x + 3 = 3 (x - 12)

Resolver para

x, x + 3 = 3 (x - 12) : x = \frac{39}{2}

Hallar David's age 12 years ago:

7 \frac{1}{2}

Davi d^{'} s age 12 years ago : 7 \frac{1}{2}

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