Question 1009017
Mary's time: {{{ x }}} min
James time: {{{ x + 20 }}} min
Phillip's time: {{{ 2*( x + 20 ) }}}
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Time for James and Phillip:
{{{ x + 20 + 2*( x + 20 ) }}}
{{{ x + 20 + 2x + 40 }}}
{{{ 3x + 60 }}}
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{{{ t = x + 3x + 60 }}}
{{{ t = 4x + 60 }}} is the time in 
minutes for all three