<PRE><B>Question 278823</B>
{{{X*(3mi/hr) = 4mi - X*(2mi/hr)}}}
Simplify
{{{(3Xmi/hr) = 4mi - (2Xmi/hr)}}}
Add {{{(2Xmi/hr)}}} to both sides
{{{(5Xmi/hr) = 4mi}}} Divide both sides by 5mi/hr
{{{X = (4/5)h}}}

We can convert this to minutes
1 hour = 60 min
{{{(4/5) * 60 = 48min}}}

They will meet each other 48 min after leaving their houses.</PRE>