Question 1075531
x, youngest daughter
y, oldest daughter


{{{system(y=x+2,(x+10)+(y+10)=38)}}}


{{{x+y=38-20}}}

{{{x+y=18}}}


{{{x+(x+2)=18}}}

{{{2x=16}}}

{{{highlight(system(x=8,y=10))}}}