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konstantin123 [22]
3 years ago
12

Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4?

Mathematics
1 answer:
Gekata [30.6K]3 years ago
7 0
Cancel y values
multiply 2nd equation by 4 and add to first

-9x+4y=8
<u>-12x-4y=16 +</u>
-21x+0y=24

-21x=24
divide both sides by -21
x=24/-21
x=-8/7

C is answer
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Answer:

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Step-by-step explanation:

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First, we rewrite the expression:

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From here we get a solution for x = 10

To check it we substitute x = 10 in the expression:

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Answer:

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