johnoclark johnoclark
  • 22-07-2019
  • Mathematics
contestada

Find a solution to the following system of equations. -2x + y= -3 -x+2y+3

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carlosego
carlosego carlosego
  • 22-07-2019

For this case we have the following system of equations:[tex]-2x + y = -3\\-x + 2y = 3[/tex]

We multiply the first equation by -2:

[tex]4x-2y = 6[/tex]

We add the equations:

[tex]-x + 2y = 3\\4x-2y = 6[/tex]

Adding we have:

[tex]4x-x-2y + 2y = 3 + 6\\3x = 9\\x = \frac {9} {3}\\x = 3[/tex]

We look for the value of "y":

[tex]-x + 2y = 3\\-3 + 2y = 3\\2y = 3 + 3\\2y = 6\\y = \frac {6} {2}\\y = 3[/tex]

So, the solution is [tex](x, y) :( 3,3)[/tex]

Answer:

[tex](x, y) :( 3,3)[/tex]

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