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20 March, 20:50

Your biking at a speed of 18 miles per hour. Your 3 miles behind your friend, who is biking at a speed of 12 miles per hour. Write and solve an equation to find the amount of time it takes for you to catch up with your friend

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  1. 20 March, 23:52
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    Let us say that:

    d = distance of friend

    d + 3 = your distance

    so that:

    d = 12 t

    d + 3 = 18 t

    Combining the 2 equations:

    12 t = 18 t - 3

    6 t = 3

    t = 0.5 hours

    Therefore you catch up after 0.5 hours or ½ hours.
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