Question

x+y=8
x-y=4
Amigos por favor ayúdenme
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Answer 1

Respuesta:

Saludos... :D

Explicación paso a paso:

$\begin{bmatrix}x+y=8\\ x-y=4\end{bmatrix}\\\\\\\mathrm{Sustituir\:}x=8-y\\\\\\\begin{bmatrix}8-y-y=4\end{bmatrix}\\\\\\\begin{bmatrix}8-2y=4\end{bmatrix}\\\\\\\mathrm{Para\:}x=8-y....\mathrm{Sustituir\:}y=2\\\\\\x=8-2\\\\\\x=6\\\\\\x=6,\:y=2\\\\\\Atte...nosenadaoficial$