What do the variables stand for?

$g = 12$

$h = 28$

$i = 1$

$j = 0$ (at times, $j = 1$)

$k = 4$

$l = 2$

$m = g - (k + i)$

$n = 3$

$x = gh + ij + kl + mn$

The correct answer should contain words only, not numbers.

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– Deusovi
Aug 12 '16 at 2:29

The variables stand for

days in specific months, and months of the year.

In particular:

$g$ is the number of months. Each month has at least $28$ days, so it's multiplied by 28 (in the variable $h$).
$i$, $k$, and $m$ are the number of months with exactly $29$, $30$, and $31$ days respectively. $j$, $l$, and $n$ are the number of days you need to add to the original $28$ for each month in the year that has the corresponding number of days. And of course, $x$ is the number of days in the year!

Full list:

$g$: the number of months in the year.
$h$: the number of minimum days in each month.
$i$: the number of months with a certain number of days. (That number happens to be $29$, but that knowledge is not necessary to understand the equation.)
$j$: the number of additional days after the minimum for each month in category $i$.
$k$: the number of months with a certain number of days different from $h$ 's. (That number happens to be $30$, but that knowledge is not necessary to understand the equation.)
$l$: the number of additional days after the minimum for each month in category $k$.
$m$: the number of months currently unaccounted for.
$n$: the number of additional days after the minimum for each month in category $m$.
$x$: the total number of days in the year.