raselabby raselabby

21-01-2021
Mathematics

contestada

-6x-3y=-30
-9x-y=-24
Solve by elimination

Respuesta :

kiradance702 kiradance702

21-01-2021

Answer:

x=2. y=6

Step-by-step explanation:

Step (1)

-6x-3y=-30

-3(-9x-y=-24)

Step (2)

-6x-3y=-30

27x+3y=72

Step (3)

-6x+27x=21x

-30+72=42

Step (4)

21x=42

divide 21 on each side

x=2

Plug x in one of the two equations

to get the y

-6(2)-3y=-30

-12-3y=-30

+12. +12

-3y=-18

divide negative 3

y=6

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