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Yuki888 [10]
3 years ago
9

Twelve decreased by twice a number is the same as 8 times the sum of the number and 4. What is the number.

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer: -2

Step-by-step explanation:

Let the number be x , then twice the number is 2x.

Twelve decreased by twice the number = 12 - ( 2x )

8 times the sum of the number and 4 = 8 ( x + 4 )

combining the two , we have

12 - 2x = 8 ( x + 4 )

12 - 2x = 8x + 32

12 - 32 = 8x + 2x

-20 = 10x

x = -20/10

x = -2

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