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Which value of x satisfies both -9x + 4y = 8 and -3x - y = 4 given the same value of y?
ОА
1
7
ОВ.
7
9
Ос.
8
7
D. -9
OE.
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Respuesta :

Answer:

-[tex]\frac{8}{7}[/tex]

Step-by-step explanation:

-9x+4y=8

-3x-y=4

Multiple the entire second equation by 4

-12x-4y=16

-9x+4y=8

__________

-21x=24

divide each side by -21 and simplify

x= -[tex]\frac{8}{7}[/tex]

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