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Between 1820 and 1860, describe the rise of the factory system in the united states

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Answer:

300 %

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User Wachaga Mwaura
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A man traveled a certain number of miles by automobile and then nine times as far by airplane. His total trip was 600 miles in length. How far did he travel by plane?

x represents miles by automobileairplane.
9x represents miles by automobileairplane.