3 years ago

97. An elevator in a tall building goes up 7 floors, then

Mathematics

1 answer:

Komok [63]3 years ago

5 0

so, start floor = x

x + 7 - 9 - 4 + 8 - 2 = 14

x = 14

the elevator started on the 14th floor.

to verify: 14 + 7 = 21 - 9 = 12 - 4 = 8 + 8 = 16 - 2 = 14

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