Respuesta :

Answer:

Line 5

Step-by-step explanation:

[tex]3(x-2)=18\\3x-6=18\\3x-6+6=18+6\\3x=24\\x=8[/tex]

The 5th line is incorrect because [tex]x[/tex] is actually supposed to be [tex]8[/tex]. They did not divide both sides by 3 properly.

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