Question 136601
Time for outbound trip: {{{t[1]}}}
Time for return trip: {{{t[2]}}}
Distance to/from destination: {{{d}}}


For the outbound trip:  {{{d=24t[1]}}}, but that can be expressed as {{{t[1]=d/24}}}
For the return trip: {{{t[2]=d/18}}}


But {{{t[1]+t[2]=4.9}}}, so {{{(d/24)+(d/18)=4.9}}}


LCD for 24 and 18 is 72 (3 * 24 = 4 * 18 = 72)


{{{3d/72+4d/72=4.9}}}


{{{7d=4.9*72}}}


{{{d=.7*72=50.4}}}


Check:
Outbound trip:  {{{t[1]=50.4/24=2.1h}}}
Return trip: {{{t[2]=50.4/18=2.8h}}}


{{{t[1]+t[2]=2.1+2.8=4.9}}} Answer checks.