Question

comprobacion de 7×-12y=11
-x-6y=8​

Answer 1

Explicación paso a paso:

7×-12y=11

-x-6y=8 ....... × - 2

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7x-12y=11

2x+12y = -16

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9x = - 5

x=-5/9

remplazamos

-x-6y=8

-(-5/9)-6y = 8

5/9 - 6y = 8

5 - 54y = 72

-54y = 72- 5

-54y = 67

y = - 67/54