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She drove for 142.5 miles at a speed of 57 mph. For how many hours did she drive?

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解答

Shedrovefor142.5milesataspeedof57mph.Forhowmanyhoursdidshedrive?

解答

time:2.5
求解步骤
Translate the problem into an equation:142.5=57x
求解 x,142.5=57x:x=2.5
time:2.5

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