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anonymous

  • 5 years ago

if 9-5x=12-(6x+7) evaluate x(second power)-3x-2

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  1. anonymous
    • 5 years ago
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    so one way to do this is to solve for x 1. 9 - 5x = 12 - (6x + 7) 2. 9 - 5x = 12 -6x - 7 3. 9 - 5x = 5 - 6x 4. 4 - 5x = -6x 5. 4 = -x 6. x = -4

  2. anonymous
    • 5 years ago
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    so now that you have the value of x, you can stick it into your second equation

  3. anonymous
    • 5 years ago
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    does that make sense?

  4. anonymous
    • 5 years ago
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    oh ok so i had to solve that one part to evaluate the other part

  5. anonymous
    • 5 years ago
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    right exactly

  6. anonymous
    • 5 years ago
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    this is probably setting you up to learn how to do substitution problems, in which the last step is usually inserting the solution to one equation into the next

  7. anonymous
    • 5 years ago
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    (subsituting)

  8. anonymous
    • 5 years ago
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    k thanks sandra!

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spraguer (Moderator)
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