Math

Can someone help me with a formula for this?

A container ship left the Azores and
traveled north. An aircraft carrier left two
hours later traveling 5 km/h faster in an
effort to catch up to it. After eight hours
the aircraft carrier finally caught up.
What was the container ship's average
speed?

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  1. rate of container ship ---- x km/h
    rate of carrier ------- x+5 km/h
    after 8 ours, carrier caught up, they went the same distance.
    10x = 8(x+5)

    solve for x

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