SOLUTION: y=7-x;y^2+x^2=9 solve using system of equations algebraically.

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Question 449814: y=7-x;y^2+x^2=9 solve using system of equations algebraically.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
%287-x%29%5E2+%2B+x%5E2+=+9
49+-+14x+%2B+x%5E2+%2B+x%5E2+=+9
<==> 2x%5E2+-+14x+%2B+40+=+0
<==> x%5E2+-+7x+%2B+20+=+0
Now use the quadratic formula to find the values of x.