Question 1012827
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Leah travels 270 km. Deb travels 250 km in the same time. Leah drives 4 km/h faster. what {{{highlight(speed)}}} are they each travelling at ?
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Let x be Leah' speed in {{{km/h}}}.
Then Deb' speed is (x-4) {{{km/h}}}.

The equation is 

{{{250/(x-4)}}} = {{{270/x}}}.

To solve it, multiply both sides by x*(x-4). You will get

250x = 270*(x-4),

250x = 270x - 1080,

20x = 1080,

x = {{{1080/20}}} = 54 {{{km/h}}}.

<U>Answer</U>. Leah' speed was 54 {{{km/h}}}. Deb' speed was 50 {{{km/h}}}.
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