FAN AND MEDAL***

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FAN AND MEDAL***

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Given the system of equations presented here: 4x + y = 4 2x + 7y = 28
Which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? A)Multiply the second equation by −1 to get −2x − 7y = −28 B)Multiply the second equation by −4 to get −8x − 28y = −112 C)Multiply the first equation by −7 to get −28x − 7y = −28 D)Multiply the first equation by −2 to get −8x − 2y = −8

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Other answers:

Have you done this thing before?
no, i think i posted but nobody answered ;/
You can multiply an entire equation through by a number and it will not change the line... you want to do that on one of the two, so when you add them together, one variable cancels out to zero
There is more than one way to do it, but by the choices, we will eliminate the y by multiplying the first equation through by a -7, so -7y + 7y = 0 4x + y = 4 2x + 7y = 28 -28x - 7y = -28 2x + 7y = 28 ------------------ add together -26x = 0
its C?
yes
THANK YOU!!!! DANJS
welcome

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