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Solve

\(\begin{align*} a + 2b &= 1, \\ b + 2c &= 3, \\ c + 2a &= 7. \end{align*}\)

 Jul 11, 2020
 #1
avatar+28021 
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From 1st eq     b =   (1-a)/2

From 3rd eq     c = 7-2a            sub these into second equation

 

(1-a)/2   + 14-4a = 3

1-a        + 28-8a = 6

29 -9a = 6

 

a = 23/9

 

b= -14/18 = -7/9

 

c= 17/9

 Jul 11, 2020

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