xkelsyo xkelsyo
  • 25-11-2021
  • Mathematics
contestada

Solve the system of equations algebraically.

3x−6y=−15
−9x+12y=21

Respuesta :

namboozejovia2
namboozejovia2 namboozejovia2
  • 25-11-2021

Answer:

(3x-9x)+12y-6y=21-15

-6x+6y=6.

I think that is the answer

Answer Link
mhanifa
mhanifa mhanifa
  • 29-11-2021

Answer:

  • (3, 4)

Step-by-step explanation:

Solve the system by elimination.

Divide the second equation by 3 and add to fist equation:

  • 3x - 6y - 9x/3 + 12y/3 = -15 + 21/3
  • 3x - 3x - 6y + 4y = -15 + 7
  • -2y = - 8
  • y = -8/-2
  • y = 4

Find the value of x:

  • 3x - 6*4 = - 15
  • 3x - 24 = - 15
  • 3x = 24 - 15
  • 3x = 9
  • x = 3

Answer Link

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