SOLUTION: this is one function: {x+y=c {x-y=a I need to find x and y

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Question 1075963: this is one function:
{x+y=c
{x-y=a
I need to find x and y
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
{x+y=c
{x-y=a
2x=c+a
x=(c+a)/2
y=c-x=c-(c+a)/2
y=(2c-c-a)/2=(c-a)/2
Put in numbers x=4 y=2
c=6, a=2
x=(6+2)/2, which is 4
y=(6-2)/2, which is 2