Question 106123



let one number be {{{x}}}, and another one be {{{y}}}:

given:

{{{x+y = 60}}}

{{{x-y = 7}}}

from first equality:

{{{x+y = 60}}}
{{{x= 60 - y}}}  let substitute it in second equality

{{{x-y=7}}}
{{{60-y-y=7}}}
{{{60 -2y=7}}}

{{{60-7 = 2y}}}

{{{53 = 2y}}}
{{{y = 53/2}}}

{{{y = 26.5}}}

then
{{{x=7+y}}}
{{{x= 7+26.5}}}

{{{x = 33.5}}}

{{{33.5+26.5= 60}}}
{{{33.5 - 26.5=7}}}