Question 705385
{{{ t }}} = traveler's speed in ft/sec
{{{ w }}} = walkway's speed in ft/sec
given:
{{{ t - w = 2 }}}
{{{ t + w = 6 }}} 
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Add the equations
{{{ 2t = 8 }}}
{{{ t = 4 }}}
and
{{{ t + w = 6 }}} 
{{{ 4 + w = 6 }}} 
{{{ w = 2 }}}
The traveler's speed off the walkway is 4 ft/sec
The speed of the moving walkway is 2 ft/sec