2. One elevator of a tall building started from a certain floor, went up 7 floors, and stopped. Then it went 20 floors down and stopped. Then it went up to the floor twice as high as the previous floor where it stopped. Then it went down 7 floors and finally stopped at the 63rd floor. At what floor did the elevator start? 2

2. One elevator of a tall building started from a certain floor, went up 7 floors, and stopped. Then it went 20 floors down and stopped. Then it went up to the floor twice as high as the previous floor where it stopped. Then it went down 7 floors and finally stopped at the 63rd floor. At what floor did the elevator start? 2

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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