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3 years from now david's age will be 3 times his age 12 years ago. How old was david 12years ago

Solution

3 years from now david's age will be 3 times his age 12 years ago. How old was david 12years ago

Solution

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

Solution steps

Translate the problem into an equation:

x + 3 = 3 (x - 12)

Solve for

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

Find 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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