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25 February, 03:06

When 40 is added to the number of miles Karen ran last week, the result is the same as adding 10 to 4 times the number of miles she ran last week. How many miles did Karen run last week?

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  1. 25 February, 03:27
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    X+40=4x+10

    4x-x=40-10

    3x=30

    x=10 miles

    Answer: 10 miles
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