SOLUTION: x-y=8 x+y=-2

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: x-y=8 x+y=-2      Log On


   



Question 417464: x-y=8
x+y=-2

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(1) x-y=8
(2) x%2By=-2
Add the equations
2x+=+6
Divide both sides by 2
x+=+3
Now plug this back into either (1) or (2)
(1) 3+-+y+=+8
Subtract 3 from both sides
(1) -y+=+5
Multiply both sides by -1
y+=+-5
The solution is (3,-5)
or, in other words:
x+=+3
y+=+-5