epzcherryperez
epzcherryperez epzcherryperez
  • 25-02-2020
  • Mathematics
contestada

2x - y = 4
4x - 2y=8
please help me :''')​

Respuesta :

XaniHan
XaniHan XaniHan
  • 27-02-2020

Answer:

y = 2x - 4

x = R

Step-by-step explanation:

[tex]\left \{ {{2x - y = 4} \atop {4x - 2y = 8}} \right.[/tex]

1)

2x - y = 4

-y = -2x + 4

y = 2x - 4

2) to find x

replace y by 2x - 4 in the second equation

4x -2y = 8

4x -2(2x-4) = 8

4x -4x +8 = 8

4x -4x = 8-8

4x -4x = 0

0 = 0 ⇒ any number is possible for x

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