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Subjects>Math>Math & Arithmetic

What is -15 equals 3x - 12?

Anonymous

∙ 12y ago

Updated: 12/23/2022

- 15 = 3X - 12

add 12 to each side

12 + - 15 = 3X - 12 + 12

- 3 = 3X

divide both sides integers by 3

- 3/3 = (3/3)X

- 1 = X

======check in original equation

- 15 = 3(- 1) - 12

- 15 = - 3 - 12

- 15 = - 15

=========checks

Wiki User

∙ 12y ago

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3x-4x=12 that means -x equals 12 so x equals -12

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