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nicole10

  • 4 years ago

In order to solve a system of equation by substitution, you must always solve for y in one of the equations and then back-substitute. true or false

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  1. yernpaul
    • 4 years ago
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    true..

  2. nicole10
    • 4 years ago
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    why cant you solve for x what is the difference

  3. yernpaul
    • 4 years ago
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    it depend on what type of unknown you use. like in your question, the unknown is in term of y.

  4. nicole10
    • 4 years ago
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    thanks

  5. Directrix
    • 4 years ago
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    False. You could solve for x and back substitute. Or, what if your system of equations had no y-variable Such as: a + b = 7 5a - 7b = 10

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