Question 274940
{{{d = r*t}}}
(1) {{{d = 32t}}}
{{{d = (32 + 4)*(t - .5)}}}
{{{d = 36*(t - .5)}}}
(2) {{{d = 36t - 18}}}
Substitute (1) into (2)
{{{32t = 36t - 18}}}
{{{4t = 18}}}
{{{t = 4.5}}} hrs
and, since
{{{d = 32t}}}
{{{d = 32*4.5}}}
{{{d = 144}}} mi