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raebaby420

  • 3 years ago

What is a possible first step to eliminate the variable x in the following system? 2x – 7y = 3 4x + 5y = –2

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  1. Directrix
    • 3 years ago
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    Multiply each member of this equation by (-2) and post the result here. Equation: 2x – 7y = 3

  2. ryan.g.campbell.17
    • 3 years ago
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    Top one by -2 :) -4x + 14y = -6 4x + 5y = -2 19y = -8 and you can work it from there :)

  3. Directrix
    • 3 years ago
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    @ryan.g.campbell.17 ---> This question was for the Asker and not for your deus ex machina. Read the Code of Conduct. @raebaby420 Yes. The objective in the Addition/Subtraction method of solving simultanteous linear equations is to multiply by a number that will cause the coefficient of the variable you wish to eliminate to add out.

  4. raebaby420
    • 3 years ago
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    Ok.. so i think i understand it

  5. raebaby420
    • 3 years ago
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    Soo i just gotta single out my coefficient?

  6. Directrix
    • 3 years ago
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    @raebaby420 Let's try another one. Same instructions. Answer? 3x + 4y = 7 3x - 4y = 10

  7. raebaby420
    • 3 years ago
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    umm haha i have no clue.

  8. raebaby420
    • 3 years ago
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    whats the first step i have to complete?

  9. Directrix
    • 3 years ago
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    Question: What added to 3x gives 0? (3x) + ? = 0 ? =

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