Erc88 Erc88
  • 03-03-2019
  • Mathematics
contestada

sorry about the bad photo. I really need help.​

sorry about the bad photo I really need help class=

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 03-03-2019

Answer:

(3,-1)

Step-by-step explanation:

2x -7y = 13

3x+y = 8

Multiply the second equation by 7

7(3x+y) = 7*8

21x +7y = 56

Add this to the first equation to eliminate y

2x -7y = 13

21x +7y = 56

-----------------------

23x = 69

Divide each side by 23

23x/23 = 69/23

x = 3

3x+y = 8

3(3) +y = 8

9+y = 8

Subtract 9 from each side

9-9 +y =8-9

y = -1

(3,-1)

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