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Solmyr

  • 3 years ago

Part 1: Decide whether you would use the graphing, substitution, or elimination method to solve the following system of equations. Explain, in complete sentences, why you chose that method. Part 2: Solve the following system of equations and show all of your work. 2x + 5y = −3 −15x − 5y = −10

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  1. cinar
    • 3 years ago
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    elimination method

  2. cinar
    • 3 years ago
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    sum both side, what you get..

  3. alrightatmaths
    • 3 years ago
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    I agree. Use elimination. If you just add the two equation together, the -5y and +5y cancel out and leaves you with only xs.

  4. alrightatmaths
    • 3 years ago
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    So you'd have -13x = -13 so x = 1

  5. Solmyr
    • 3 years ago
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    but why do u chose elimination

  6. alrightatmaths
    • 3 years ago
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    Because it's quick and easy and gets rid of the ys straight away so you can quickly solve for x.

  7. Solmyr
    • 3 years ago
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    ok now can you help me go step by step with the rest?

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