jpcarlos2506 jpcarlos2506

11-12-2021
Mathematics

contestada

-3x + 4y = -15 and 4x - y = -19

Respuesta :

Yang100 Yang100

12-12-2021

Answer:

x=-7, y=-9. (-7, -9).

Step-by-step explanation:

-3x+4y=-15

4x-y=-19

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

y=4x-(-19)

y=4x+19

-3x+4(4x+19)=-15

-3x+16x+76=-15

13x=-15-76

13x=-91

x=-91/13

x=-7

4(-7)-y=-19

-28-y=-19

y=-28-(-19)

y=-28+19

y=-9

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