notsomathwiz
notsomathwiz
21-01-2016
Mathematics
contestada
Solve for x: −3|x + 7| = −12
Respuesta :
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
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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