SOLUTION: if a+1=b*2 and b+1=a what is a?

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Question 172662: if a+1=b*2 and b+1=a what is a?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a+1=b*2
b+1=a
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what is a?
b = a-1
Substitute to solve for "a":
a+1 = (a-1)^2
a+1 = a^2 -2a + 1
a^2 -3a = 0
a(a-3) = 0
a = 0 or a = 3
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Cheers,
Stan H.