Giveaway equation

Algebra Level 1

Let

2a+1=b, 2b+1=c, 2c+1=a.

Find the value of a.


The answer is -1.

K. J. W. by K. J. W. , 20, Singapore

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2 solutions

Claudia Manotti
Aug 11, 2017

-1 is a fix point of the trasformation f(x)=2x+1. Since it's a first degree problem -1 is the solution

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K. J. W.
Jul 28, 2014

We have

2(2(2a+1)+1)+1=a

8a+7=a

7a=-7

a=-1

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You should really add something like 'find a'. It is not currently clear what you want us to put into the answer box.

mathh mathh - 6 years, 10 months ago

Thanks. I edited it to add 'Find the value of a'.

K. J. W. - 6 years, 10 months ago

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