$29 + $4.50x = $42.50
$29-29 + $4.50x = $42.50-$29
$4.50x = $13.50
$4.50x/$4.50 = $13.50/$4.50
x = 3
She can buy 3 bracelets.
The link leads to a single table, and that table doesn't show [ y = 18x ].
You're looking for a table in which each 'y'-value is
18 times the 'x'-value that's right next to it.
Good luck in your quest.