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ShadowCain

  • one year ago

The product of 9 and a number is 12 less than three times that number. What is the number?

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  1. Directrix
    • one year ago
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    Let x be the number. The product of 9 and the number is: 9x

  2. Directrix
    • one year ago
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    Three times that number is 3x 12 less than three times that number is 3x - 12

  3. ShadowCain
    • one year ago
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    9x=3x-12 6x=-12 x=-2

  4. Directrix
    • one year ago
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    Your task: To solve the equation: 9x = 3x - 12 @ShadowCain

  5. ShadowCain
    • one year ago
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    9x = 3x - 12 = -2

  6. Directrix
    • one year ago
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    >> 9x = 3x - 12 = -2 You lost the variable x. |dw:1443905024059:dw|

  7. Directrix
    • one year ago
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    @ShadowCain Do you agree?

  8. ShadowCain
    • one year ago
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    That's what I meant, I just didn't put x = -2 But the answer was right, right?

  9. Directrix
    • one year ago
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    Correct.

  10. ShadowCain
    • one year ago
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    thanks

  11. Directrix
    • one year ago
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    You are welcome.

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