Respuesta :
a = albums, m = # months
$200m + 12a = 644
$200(1) + 12a = 644
200 + 12a = 644
12a = 444
a = 444/12
a = 37
$200m + 12a = 644
$200(1) + 12a = 644
200 + 12a = 644
12a = 444
a = 444/12
a = 37