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31 October, 11:55

If 3x - 1 = 11, what is the value of x2 + x?

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  1. 31 October, 12:34
    0
    Okay. 3x - 1 is 11. Add 1 to both sides and you'll get 3x = 12. Divide both sides by 3, and you'll get x = 4. In this case, the problem will be written out as 4 * 2 + 4. Do order of operations. For this problem, we multiply first. 4 * 2 is 8. Next, we add. 8 + 4 = 12. The value of x2 + x is 12.
  2. 31 October, 13:30
    0
    3x-1=11

    Add 1 to both sides

    3x=12

    Divide both sides by 3

    x=4

    Plug the known x value into the expression x^2+x

    4^2+4

    Simplify

    16+4

    20

    Final answer: 20
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