Question 315161
Let the two numbers be {{{x}}} and {{{y}}}.
1.{{{y=5+x}}}
2.{{{x+y=3*x-3}}}
Substitute eq. 1 in eq. 2 to remove y.
{{{x+5+x=3x-3}}}
{{{2x+5=3x-3}}}
{{{highlight( x=8)}}}
Then from eq. 1,
{{{y=5+x}}}
{{{y=5+8}}}
{{{highlight( y=13)}}}