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So let x= Leah, so this means that (x+10)=May, because she travels 10 Kmph more than Leah. It takes Leah 3 times more time to get there than May, so x=3(x+10). Distribute your 3, so x=3x+30. This means that Leah's equation is d=3x, and May's is d=x+10. 3x is equal to x+10, this is just a complicated form of an equality. Solve for x:
3x=x+10
-x -x
2x=10
2x/2=10/2
x=5, So Leah= 5 Kmph, and May= 15 Kmph.
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