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vladimir1956 [14]
2 years ago
13

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

Mathematics
1 answer:
kozerog [31]2 years ago
7 0

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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