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Mrszbieberxo

  • 3 years ago

[6.02] For the following system, if you isolated y in the first equation to use the Substitution Method, what expression would you substitute into the second equation? 4x − y = 8 2x + 3y = 9

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  1. kropot72
    • 3 years ago
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    4x - y =8 The first step to isolate y is to subtract 4x from both sides of the equation. Can you do that?

  2. kropot72
    • 3 years ago
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    @Mrszbieberxo Are you there?

  3. Mrszbieberxo
    • 3 years ago
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    yes I got infinitely many solutions

  4. kropot72
    • 3 years ago
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    Can you please do the step that I gave previously. 4x - y =8 The first step to isolate y is to subtract 4x from both sides of the equation. Can you do that?

  5. Mrszbieberxo
    • 3 years ago
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    y=4?

  6. kropot72
    • 3 years ago
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    Not really. Subtracting 4x from both sides gives: 4x - y - 4x = 8 - 4x ...............(1) Can you simplify the left hand side of (1)?

  7. Mrszbieberxo
    • 3 years ago
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    I'm sorry i'm really confused :/

  8. kropot72
    • 3 years ago
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    We are looking at simplifying the left hand side of 4x - y - 4x = 8 - 4x ...............(1) If the terms on the left hand side are rearrangedas follows is the simplification clearer? (4x - 4x) - y = 8 - 4x Hint: What is 4x - 4x ?

  9. kropot72
    • 3 years ago
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    rearranged as*

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