Question

5x-9y= -50
{
-6x + 2y = 16


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Answer 1

Respuesta:

5x - 9y = -50 (6)

-6x + 2y = 16 (5)

30x -54y = -300

-30x + 10y = 80

--------------------------

/. -44y = -220

y = 5

5x - 9(5) = -50

5x - 45 = -50

5x = -50 + 45

5x = -5

x = -1

Answer 2

Explicación paso a paso:

5x=-50+9y

x=(-50+9y)/5

sustituyo en la segunda la x

-6{(-50+9y)/5}+2y=16

(300-54y)/5+2y=16

(300-54y)/5+(2y×5)/5=(16×5)/5

300-54y+10y=80

-44y=80-300

-44y=-220

y=220/44

y=5

x=(-50+9y)/5

x=(-50+9×5)/5

x=(-10+9)5/5

x=-1