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1 Answer
Apr 2, 2018

x=8

Explanation:

One way to solve 3x+1=x3 is by squaring both equation terms or

3x+1=(x3)2

This operation is responsible for the introduction of strange solutions because solving

x26x+9=3x+1x29x+8=0 we have

x26x+9=(x1)(x8)=0 and after substitution in the initial equation we conclude that x=1 is not feasible and the solution is x=8