Question

[tex] {3 \times + y = 4 - y + 2 \times = 1[/tex]
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Answer 1

Respuesta:

3x+y=4-y+2x=1

[tex]\begin{bmatrix}3x+y=4\\ -y+2x=1\end{bmatrix}\\\\\\\begin{bmatrix}-y+2\cdot \frac{4-y}{3}=1\end{bmatrix}\\\\\\\begin{bmatrix}\frac{8-5y}{3}=1\end{bmatrix}\\\\\\x=\frac{4-1}{3}\\\\\\x=1\\\\x=1,\:y=1[/tex]