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Let xx represent the number of sets of knives that Jordan could buy.
Since each set contains 10 knives, the total number of knives in xx sets would be 10 * xx.
To have enough knives, the restaurant needs at least 730 knives, so we can write the inequality as:
10 * xx + 204 ≥ 730
Simplifying the inequality, we can subtract 204 from both sides:
10 * xx ≥ 526
Now, we divide both sides of the inequality by 10:
xx ≥ 52.6
Since the number of sets of knives cannot be a decimal, the smallest integer greater than or equal to 52.6 is 53.
Jordan could buy at least 53 sets of knives to ensure that the restaurant has enough knives.