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DragonFlame

  • 11 months ago

Solve the given system, using the substitution method. y = 3x – 4 9x – 3y = 14

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  1. DragonFlame
    • 11 months ago
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    @hartnn

  2. DragonFlame
    • 11 months ago
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    A. There is no solution. B. (12, 14) C. (14, 12) D. There are an infinite number of solutions.

  3. hartnn
    • 11 months ago
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    plug in y= 3x -4 in the 2nd equation 9x - 3(3x-4) = 14 can you find 'x' from here ? try

  4. DragonFlame
    • 11 months ago
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    I tried that and got \[9x-9x-12=14\]

  5. hartnn
    • 11 months ago
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    -3*-4 is actually +12

  6. DragonFlame
    • 11 months ago
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    -.- I feel stupid :P

  7. hartnn
    • 11 months ago
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    and note that 9x-9x =0

  8. hartnn
    • 11 months ago
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    so, 12 = 14 is that even possible ?

  9. DragonFlame
    • 11 months ago
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    So, its A no solution

  10. hartnn
    • 11 months ago
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    absolutely correct :)

  11. DragonFlame
    • 11 months ago
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    Thanks for helping me do it myself :)

  12. hartnn
    • 11 months ago
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    most welcome ^_^

  13. DragonFlame
    • 11 months ago
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    Instead of giving the answer you helped me understand

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