SOLUTION: a biker can travel at a speed of x km/h over a distance of 15km. if the biker reduces his speed by 2km/h he will only manage to travel 10km for the same time Calculate x

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Question 427609: a biker can travel at a speed of x km/h over a distance of 15km. if the biker reduces his speed by 2km/h he will only manage to travel 10km for the same time Calculate x
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
t=d/r
t = same
15/x= 12/x-2
15(x-2)=12x
15x-30=12x
15x-12x=30
3x=30
x=10