Question 1202393
{{{y-12=3(x-12)}}}
{{{y-12=3x-36}}}
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{{{y+12=2(x+12)}}}
{{{y+12=2x+24}}}
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{{{system(y-3x=-24,y-2x=12)}}}


{{{system(3x-y=24,2x-y=-12)}}}


{{{x=36}}}


{{{y=3x-24}}}
{{{y=3*36-24}}}
{{{y=84}}}


Ratio of present ages?  Father to Daughter:  {{{84/36=42/18=highlight(7/3)}}}