Question 903506
________________speed________time__________distance
MIA______________60__________t_____________60t=d
MOTHER___________80__________t-1/2_________80(t-1/2)=d


d is the distance for both trips.
{{{60t=80(t-1/2)}}}
{{{3t=4(t-1/2)}}}
{{{3t=4t-2}}}
{{{highlight(t=2)}}}