Cristina1r Cristina1r
  • 17-09-2015
  • Mathematics
contestada

Y=5x+19
-4x-2y=18
How do I solve this system?

Respuesta :

TSO
TSO TSO
  • 18-09-2015
[tex]y=5x+19\\ -4x-2y=18[/tex]

Lets solve it by substitution

[tex]-4x-2(5x+19)=18\\-4x -10x- 38 = 18\\-14x -38=18\\-14x = 56\\\\x = -4[/tex]

Now we plug x = -4 and solve for y

[tex]y=5x+19\\y = 5(-4) + 19\\y=-20 + 19\\\\y = -1[/tex]

So the solution is (-4,-1)

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