vf5867 vf5867
  • 23-05-2020
  • Mathematics
contestada

3x+4y=-16 and 5x+5y=-5

Respuesta :

ranau1199
ranau1199 ranau1199
  • 23-05-2020

Answer:

[tex]y=-13,\:x=12[/tex]

Step-by-step explanation:

[tex]\begin{bmatrix}3x+4y=-16\\ 5x+5y=-5\end{bmatrix}\\\\\begin{bmatrix}5\cdot \frac{-16-4y}{3}+5y=-5\end{bmatrix}\\\\[/tex]

[tex]-\frac{80}{3}-\frac{5y}{3}=-5\\y=-13\\\\x=\frac{-16-4\left(-13\right)}{3}\\x=12[/tex]

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