Mathematics, 03.10.2019 04:30 itsmichaelhere1

Lisa wrote the expression (3x + 6x) - 2(x + 1) + 5. she simplified the expression using the following steps:
step one: 3(1 + x) - 2(x + 1) + 5
step two: 3(x + 1) - 2(x +1) + 5
step three: (x + 1) + 5
step four: x + 6
lisa says that (3x + 6x) - 2(x + 1) + 5 = x + 6. lisa's statement is incorrect. in which step did lisa first make the mistake, and what is the correct expression for that step? show your work.

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