55.65/7 = 7.95
7.95 x 12 = 95.40
12 key chains cost 95.40
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X/12 or 1/12 of X
To solve this problem, we can set up a proportion. If 9 ties cost $108, then 1 tie would cost $108/9 = $12. Therefore, 13 ties would cost 13 * $12 = $156. So, 13 ties would cost $156.
£66 divided by 12 = £5.50 each.
Divide $9.99 by 12 = .83
Apples/Cost = 12/6 = 2 So 3 pounds of apples would cost 3/2 = 1.5 units.