Question 394073
ok
let x be one number
and y be the other number

{{{x + 7 = y}}}
line this up with the other equation
{{{-x + y =  7}}}
{{{ x + y = 39}}}
now you can Cancel the X's 
{{{2y = 36}}}
{{{y = 18}}}
now that you know y, plug it in to find x
{{{x + y = 39}}}
{{{x + 18 = 39}}}
{{{x = 21}}}

the 2 numbers are 21 and 18