helnvaleria helnvaleria
  • 19-12-2019
  • Mathematics
contestada

2x+2y=10 and -5x-7y=-45
by combining the equations.

Respuesta :

mahdiyarsalavati
mahdiyarsalavati mahdiyarsalavati
  • 19-12-2019

Answer:

[tex]x = - \frac{5}{6} \\ \\ y = \frac{35}{6 } [/tex]

Step-by-step explanation:

[tex]2x + 2y = 10 \\ - 5x - 7y = - 45 \\ \\ x = 5 - y \\ 5x - 7 y = - 45 \\ \\ \\ = 5(5 - y) - 7y = - 45 \\ \\ y = \frac{35}{6} \\ \\ x = 5 - \frac{35}{6} \\ \\ x = - \frac{5}{6} [/tex]

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