Respuesta :
$10 and if she buys 6 books, with s$6 off, the answer would be 60-$6, which equals $54. So, b-$6=$54. :)
That's inpossible you need to know what's 'several'. Problems: several X 10 = b. b-6=your answer !
This is inpossible !
This is inpossible !