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notsomathwiz
notsomathwiz notsomathwiz
  • 21-01-2016
  • Mathematics
Answered

Solve for x: −3|x + 7| = −12

Verified Answer :

ayah1
ayah1 ayah1
  • 21-01-2016

-3Ix + 7I = -12              (divide -3 from each side)

Ix + 7I = -12/3

Ix + 7I = -4

x + 7 = -4     or      -x - 7 = -4

 x = -11          or       -x = 3  
                                  x = - 3


x = -3 or -11

Answer Link
Billymkhoi
Billymkhoi Billymkhoi
  • 21-01-2016

-3|x+7|= -12
⇒ |x+7|= -12/(-3)
⇒ |x+7|= 4
⇒ x+7= 4 or x+7= -4
⇒ x= 4-7 or x= -4 -7
⇒ x= -3 or x= -11

Final answer: x= -3 or x= -11~

Answer Link

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