Arianamelendezashley Arianamelendezashley
  • 25-02-2020
  • Mathematics
contestada

Solve the system of equations 3x - 5y = 8 and -7x + 8y = -4 by combining the
equations

Solve the system of equations 3x 5y 8 and 7x 8y 4 by combining the equations class=

Respuesta :

yasmitadp yasmitadp
  • 26-02-2020

Answer:

x = -4 and y = -4

Step-by-step explanation:

3x - 5y = 8

-7x + 8y = -4

Multiply first equation by 7;           21x - 35y = 56

Multiply second equation by 3;    -21x + 24y = - 12

Adding the equations we get

- 11y = 44

y = -4

3x - 5(-4) = 8

3x = 8 - 20; 3x = -12

x = -4

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