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19-11-2020
Mathematics

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1. 3x + 9 = 12x + 36
x=

Respuesta :

Holysogblade Holysogblade

19-11-2020

Answer:

x = -3

Step-by-step explanation:

3x + 9 = 12x + 36 (rewrite)

3x - 12x + 9 = 36 ------> 3x - 12x = 36 - 9

3x - 12x = 36 - 9 (collect like terms)

-9x = 36 - 9 ( substract)

-9x = 27 (divide both sides for the answer)

-9 -9

x = -3

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