Question 343325
Let {{{A}}} and {{{B}}} be the two numbers.
{{{A+B=50}}}
.
.
.
{{{2A=B+31}}}
{{{B=2A-31}}}
Substitute into the first equation,
{{{A+(2A-31)=50}}}
{{{3A=81}}}
{{{highlight(A=27)}}}
Then,
{{{27+B=50}}}
{{{highlight(B=23)}}}