Answer:
18 cars
Explanation:
50 +20x ≥ 399
Subtract 50 from each side
50 -50 +20x ≥ 399-50
20x ≥349
Divide each side by 20
20x/20 ≥349/20
x ≥17.45
Since x is cars we round up to the nearest whole number
x = 18 cars
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