# Granules

Katy had two dogs. The first one ate a pack of granules a week and the other two times longer. Katka bought them two bags of granules. How long does it last for both dogs?

Result

x =  9.333 d

#### Solution:

$\ \\ x \cdot \ ( 1/7 + 1/14) = 2 \ \\ \ \\ 3x = 28 \ \\ \ \\ x = \dfrac{ 28 }{ 3 } \doteq 9.333333 \ \\ = 9.333 \ \text{ d }$

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