giannaarnao7 giannaarnao7

23-02-2021
Mathematics

contestada

10 x + 3 y=-5
-5 x - 4 y = 10

Respuesta :

Yang100 Yang100

23-02-2021

Answer:

x=2/5, y=-3. (2/5, -3).

Step-by-step explanation:

10x+3y=-5

-5x-4y=10

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

10x+3y=-5

2(-5x-4y)=2(10)

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

10x+3y=-5

-10x-8y=20

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

-5y=15

y=15/-5

y=-3

10x+3(-3)=-5

10x-9=-5

10x=-5+9

10x=4

x=4/10=2/5

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