brutuslovens2 brutuslovens2

06-03-2020
Mathematics

contestada

How many solutions does the system have?
y = -2x - 4
ly=3x +3

Respuesta :

Yang100 Yang100

06-03-2020

Answer:

x=-8/5, y=-4/5. (-8/5, -4/5).

Step-by-step explanation:

y=-2x-4

y=3x+3

-----------

-2x-4=3x+3

-2x-3x-4=3

-5x-4=3

-5x=3+4

-5x=8

x=8/-5

y=-2(-8/5)-4

y=16/5-4

y=16/5-20/5=-4/5

Answer Link

yliu9758 yliu9758

06-03-2020

Step-by-step explanation:

y=-2x-4

y=3x+3

-----------

-2x-4=3x+3

-2x-3x-4=3

-5x-4=3

-5x=3+4

-5x=8

x=8/-5

y=-2(-8/5)-4

y=16/5-4

y=16/5-20/5=-4/5

Answer Link

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