sebaxtiangb
  • sebaxtiangb
NEED HELP 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? Multiply the second equation by −1 to get −2x − 7y = −28 Multiply the second equation by −4 to get −8x − 28y = −112 Multiply the first equation by −7 to get −28x − 7y = −28 Multiply the first equation by −2 to get −8x − 2y = −8
Mathematics
schrodinger
  • schrodinger
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welshfella
  • welshfella
you need to change the value and sign of the x term or the y-term so on addition one of the variables is eliminated
welshfella
  • welshfella
HinT: multiply the first equation by a negative number
anonymous
  • anonymous
It is C :)

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anonymous
  • anonymous
Do you know why?

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