Question 149099
First give the numbers names
Let {{{a}}} = the 1st number
Let {{{b}}} = the 2nd number
{{{a + b = 16}}} given
It doesn't matter whether I make {{{a}}} more than {{{b}}}
or {{{b}}} more than {{{a}}}, so I'll say
{{{b = a + 10}}} ({{{b}}} is greater than {{{a}}})
Now substitute the expression for {{{b}}} into the 
1st equation
{{{a + a + 10 = 16}}}
{{{2a + 10 = 16}}}
{{{2a = 6}}}
{{{a = 3}}}
And, since {{{b = a + 10}}}
{{{b = 3 + 10}}}
{{{b = 13}}}
The numbers are {{{3}}} and {{{13}}}