Question 865931
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Hi
{{{5mi/20mph + 5/x = (1/3)hr}}}   |Multiplying thru by 60x so as all denominators = 1
   15x + 300 = 20x
        300 = 5x
        60mph = x
CHECKING our answer***
{{{5/20 + 5/60 = 1/4 + 1/12 = 1/3}}}
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