riveragrisel94
riveragrisel94 riveragrisel94
  • 19-12-2020
  • Mathematics
contestada

2x - y = 8
x + 3y = 4​

Respuesta :

jacobEwing
jacobEwing jacobEwing
  • 19-12-2020

Answer:

x = 4, y = 0

Step-by-step explanation:

Two find x and y, we can simply solve one of the two equations for one of the variables, and substitute it into the other.  That will provide one of the two values, which can then be plugged into either equation for the other value.  Let's do it:

[tex]2x - y = 8\\y = 2x - 8\\\\x + 3y = 4\\x + 3(2x - 8) = 4\\x + 6x - 24 = 4\\7x = 28\\x = 4\\\\y = 2x - 8\\y = 2(4) - 8\\y = 0[/tex]

So x is equal to four, and y is equal to zero.

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