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10 January, 05:23

What is the solution to this equation?

Whal

x-12 = 9

C

O A. x = 21

O B. x=-21

O C. x=-3

O D. x = 3

+3
Answers (1)
  1. 10 January, 07:23
    0
    x-12 = 9

    move - 12 to the other side

    sign changes from - 12 to + 12

    x-12+12 = 9+12

    x=9+12

    x = 21

    answer:

    A. x = 21
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