Lindsey, Laurie, and Mike showed their work solving the equation -3.3 + 73 - 5 = 8. Identify the student with the invalid first step and (justify your reasoning)

Laurie - 3x + 7x - 5 = 8
-3x + 7x - 5 = 8

Lindsey -3x + 7x – 5 = 8
-3x + 7x = 13

mike -3x + 2x = 8
4x - 5 = 8

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03.10.2020

Mathematics

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Lindsey, Laurie, and Mike showed their work solving the equation -3.3 + 73 - 5 = 8. Identify the student with the invalid first step and (justify your reasoning) Laurie - 3x + 7x - 5 = 8 -3x + 7x - 5 = 8 Lindsey -3x + 7x – 5 = 8 -3x + 7x = 13 mike -3x + 2x = 8 4x - 5 = 8