Question

resuelve por igualacion el sistema de ecuaciones 2x-y= -3,5x-5y=7 plis ayuda

Answer 1

2x - y = - 3

5x - 5y = 7

x = - 3 + y / 2

x = 7 + 5y / 5

-3 + y 7 + 5y

____ = ______

2 5

5 (-3 + y) = 2 (7 + 5y)

-15 + 5y = 14 + 10y

5y - 10y = 14 + 15

- 5y = 29

y = -29/5 ó -5.8

2x - y = - 3

2x - (-29/5) = - 3

2x + 29/5 = - 3

2x = - 3 - 29/5

2x = - 8.8

x = - 8.8 /2

x = -4.4 ó -22/5

5x - 5y = 7

5x - 5 (-29/5) = 7

5x - (-29) = 7

5x + 29 = 7

5x = 7 - 29

5x = - 22

x = -22/5 ó -4.4

y = -29/5 ó -5.8

x = -22/5 ó -4.4

Espero haberte ayudado. Saludos ≧◠◡◠≦.