Question 696647
You planned to travel {{{ 4x }}} hours total during the {{{ 4 }}} days
(a)
The first day you lost 2 hours of travel time, so you actually
traveled for {{{ x - 2 }}} hrs 
(b)
The 2nd day, you traveled for {{{ x + 1 }}} hrs
(c)
The 3rd day, you traveled for {{{ 2x }}} hrs ( double the planned time )
(d)
The 4th day, you traveled {{{ (1/4)*x }}} ( one-fourth the planned time )
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Day 1, rate was {{{ 45 }}} mi/hr
Day 2, rate was {{{ 45 }}} mi/hr
Day 3, rate was {{{ 48 }}} mi/hr
Day 4, rate was {{{ 48 }}} mi/hr
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(A)
The 1st 2 days, you traveled for
{{{ x - 2 + x + 1 = 2x - 1 }}} hrs
(B)
The last 2 days you traveled for
{{{ 2x + (1/4)*x = (9/4)*x }}} hrs
(C)
{{{ D = 45*( 2x - 1 ) + 48*( (9/4)*x ) }}}
{{{ D = 90x - 45 + 108x }}}
{{{ D = 198x - 45 }}} mi
(D)
You would have traveled {{{ 2x }}} hrs the 1st 2 days, and
{{{ 2x }}} hrs the last 2 days
{{{ D = 45*2x + 48*2x }}}
{{{ D = 90x + 96x }}}
{{{ D = 186x }}}