5(x + 4) = 5x + 20 demonstrates what property?

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Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Choose the correct translation for the following statement. it is at most ten. x< 10 x< 10 x> 10 x> 10