Ruthcox Ruthcox
  • 22-09-2017
  • Mathematics
contestada

Suppose x is a number such that 2x=x/2-6. Must it then be true that 3x=12. Explain your reasoning

Respuesta :

texaschic101
texaschic101 texaschic101
  • 22-09-2017
2x = x/2 - 6.....multiply both sides by 2
4x = x - 12
4x - x = -12
3x = -12
x = -12/3
x = -4

3x = 12......3(-4) = 12.....-12 = 12...false......so 3x = 12 is not true because x = -4



Answer Link
NourSh
NourSh NourSh
  • 22-09-2017
2x = x/2 - 6
6 + 2x = x/2
8x = x/2
x^2 = 8/2
x^2 = 4
x^2 - 4 = 0
(x - 2) (x + 2) = 0
x = 2 and x = -2

False

This is the actual right answer :) a teacher saw this :)
Answer Link

Otras preguntas

If you're aerobically fit you can?
List 3 similarities between Eukaryotic and Prokaryotic cells
How do u figure out the height of a regtangluar prism the volume is 455 and the leght Is 10 and the witch is 7
how do enzymes in your body make chemical reactions occur at safe temperature?
100 less than 146 sophiagraceandrosie
the first nation in europe to give all men the right to vote was______..
Which does not describe a cause of the Spanish-American War in 1898? A. Americans believed that the Spanish had sunk the battleship U.S.S. Maine. B. Spanish aut
Ben writes the product of 7 and 50. Then he subtracts the least 3 digit multiple of 10 from the product. What is the difference?
which religion believes that the way to stop suffering is to stop desire
Why should scientist avoid bias during experiments?