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  • 20-09-2021
  • Mathematics
contestada

3|x + 7| = 21



PLEASE HELP ASAP

Respuesta :

notyouagaincn
notyouagaincn notyouagaincn
  • 20-09-2021

Answer:

x=0, x = -14

Step-by-step explanation:

You can first divide each side with 3, which will result in :

|x+7| = 7

Then there is two cases where x is positive and x is negative :

x+7 = 7

and

x+7 = -7

x = 0

x = -14

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