Question: Which one is not a linear equation? A. 5 x + 7(x - 1) = -3x B. 9x 2 - 4 x + 3 =

Which one is not a linear equation?

A. 5 x + 7(x - 1) = -3x 

B. 9x2 - 4 x + 3 = 0

C. 7x + 8 x = 13x 

D. 0.04 x - 0.08 x = 0.40

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