Due to browser limitations, some characters are removed. I guess you mean:
is (0, 1) a solution to x + y = 1.
Yes.
Substitute the values for x and y and see what you get:
x + y = 0 + 1 = 1 as required, so yes.
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Most probably, yes.
Unfortunately, the browser used by Answers.com for posting questions is incapable of accepting mathematical symbols. This means that we cannot see the mathematically critical parts of the question. We are, therefore unable to determine what exactly the question is about and so cannot give a proper answer to your question.
If your question was about a solution to x + y = 1 the point (0,1) IS an answer.
x=x+1 0=1 this is impossible so there is no solution.
Yes, but so is everything else.
solution: y = 0 x = -1
-3 + 4.5 + 8 + 6 = -x-1 15.5 = -x-1 x-1 = -15.5 x = -1/15.5 x = -2/31
The solution is (x, y, z) = (2.5, 1, 2.5).