Mathematics: Twelve decreased by twice a number is the same as 8 times the sumof the number plus 4. what is the number?

Twelve decreased by twice a number is the same as

jadieb63

10.03.2022

The number is -2

Step-by-step explanation:

Let x be the number.

Then according to the question, we have the equation

12-2x=8(x+4)

First open parenthesis on the right side by multiplying 8 inside, we get 12-2x=8x+32

Now, Subtract 32 and add 2x from both sides we get

$\\\Rightarrow\ 12-32=8x+2x\\\Rightarrow-20=10x\\\Rightarrow\ x=\frac{-20}{10}\\\Rightarrow\ x=-2$

Hence the number is -2.

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TylieW

10.03.2022

12-2x = 8(x+4)

12-2x = 8x+32

12-10x = 32

-10x = 20

x= -2

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Jenifermorales101

20.01.2022

12.35-4.30=8.05

8.05÷3= 2.68333333333333

≈2.68

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