Question 1151350
m, Susan the mother
d, daughter


{{{system(m+3=3(d+3),(m-3)+(d-3)=56)}}}


{{{system(m-3d=6,m+d=62)}}}


{{{3d+6=62-d}}}

{{{2d=62-6}}}

{{{d=31-3}}}

{{{highlight(d=28)}}}