nic3657 nic3657
  • 13-11-2018
  • Mathematics
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|3x|=9 what's the answer and the breakdown of this problem?

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gmany
gmany gmany
  • 13-11-2018

[tex]|3x|=9\iff3x=9\ \vee\ 3x=-9\qquad\text{divide both sides by 3}\\\\x=3\ \vee\ x=-3[/tex]

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ithishreep
ithishreep ithishreep
  • 13-11-2018
  • |3x|=9 means that 3x=-9 or 3x=9 so x=3 and x=-3
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