Question

6x - 7y = -5 2x - 5y = 15​

Answer 1

Respuesta:

x = -65 / 8

y = -25 / 4

Explicación:

L1   6x - 7y = -5

L2  2x - 5y = 15​

2L1 - 6L2

12x - 14y = -10

-12x + 30y = -90

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          16y = -100

              y = -100 / 16

              y = -25 / 4

6x - 7y = -5

6x = -5 + 7y

6x = -5 + 7(-25 / 4)

6x = -5 - 175 / 4

6x = (-5*4 - 175) / 4

6x = (-20 - 175) / 4

6x = -195 / 4

x = -195 / 24

x = -65 / 8