Mathematics, 02.07.2019 09:30, macattack6276

When solving 2|x + 1| − 1 = 11 one student decided to solve the equation by first solving 2y − 1 = 11. what must have been his substitution?

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When solving 2|x + 1| − 1 = 11 one student decided to solve the equation by first solving 2y − 1 = 1...