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Rachel98

  • 3 years ago

I'm not getting this whole special system of equations thing. Please help me understand Question: Which system has an infinite number of solutions? A: y = 2x - 5 and - 2 = y - 2x. B: x + 2 = y and 4 = 2y - x. C: y + 3 = 2x and 4x = 2y - x. D: 2y + 6 = 4x and - 3 = y - 2x.

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  1. Hero
    • 3 years ago
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    If one equation is a multiple of the other equation, then both equations are the same, thus having infinite solutions.

  2. Rachel98
    • 3 years ago
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    What do you mean by multiple?

  3. Hero
    • 3 years ago
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    What I mean is, there exists a set of equations such that one of them has been multiplied by a number to disguise the fact that both of them are equal.

  4. Hero
    • 3 years ago
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    Also, terms have been switched around to disguise it even further.

  5. Hero
    • 3 years ago
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    For example, I can take y = 2x + 3 If I multiply that by 3 I get 3y = 6x + 9

  6. Hero
    • 3 years ago
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    I can switch terms around to get -9 = 6x - 3y

  7. Hero
    • 3 years ago
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    But no matter how much I manipulate this equation, each line is equivalent to the previous one.

  8. Hero
    • 3 years ago
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    So find the system where such a condition exists.

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