Question 1055404
{{{J=3+M}}}
In seven years,
{{{M+7=(6/7)(J+7)}}}
Substituting,
{{{M+7=(6/7)(3+M+7)}}}
{{{M+7=(6/7)(M+10)}}}
{{{7(M+7)=6(M+10)}}}
{{{7M+49=6M+60}}}
{{{M=11}}}
So then,
{{{J=3+11}}}
{{{J=14}}}