Question 1031850
<pre>
                       Three years ago         Now

MAN                        -                   4(d-3)

DAUGHTER                   d-3                  d

SUM                                            48
</pre>
{{{4(d-3)+d=48}}}


{{{4d-12+d=48}}}

{{{5d=48+12}}}

{{{5d=60}}}

{{{highlight(d=12)}}}, daughter's age