georgecontreras74
georgecontreras74 georgecontreras74
  • 03-05-2020
  • Mathematics
contestada

Solve for y yyyyyyyyyyyyyyyyyy

Solve for y yyyyyyyyyyyyyyyyyy class=

Respuesta :

Аноним Аноним
  • 03-05-2020

Answer:

[tex]y=-7[/tex]   is the answer.

Step-by-step explanation:

[tex]\begin{bmatrix}x+y=-4\\ x-y=10\end{bmatrix}[/tex]

Multiply the second equation with -1 and add them.

[tex]\begin{bmatrix}x+y=-4\\ -x+y=-10\end{bmatrix}\\\\\\\rightarrow 2y=-14\\\\\rightarrow y=-7[/tex]

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