tristan23 tristan23

16-03-2017
Mathematics

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

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summerb27 summerb27

16-03-2017

The number is 4/5 or 0.8.

let x be the number.

12 - 2x = 8x + 4

-12 -8x -8x -4

-10x = -8

-10x\-10 = -8/-10

x = 4/5 or 0.8

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