The sum of two numbers is 62 and their difference is 16

Question

solve this problem by using a two order system

Answer 1

let the numbers be x and y

 

sum: x+y=62

diff:  x-y=16

you now have 2 equations

 

subtract the first equation from the second

and you get 2y=46

where y=23

 

substitute y=23 into any of the equations above

that is x+23=62

subtract 23 from both sides and you get x=39