Question 1008206
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Natalie can ride her bike 4 mph faster than her husband, Chuck. 
If Natalie can ride 48 miles in the same time that Chuck can ride 24 miles, 
what are their speeds?
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<pre>
{{{24/x}}} = {{{48/(x+4)}}}.

Multiply both sides by {{{(x*(x+4))/24}}}. You will get

x + 4 = 2x.

Hense, x = 4 mph. This is Chuck' speed.

Natalie' speed is 8 mph.
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