# 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?

Correct 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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