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Guez

  • 3 years ago

Solve for x: −2(x + 3) = −2(x + 1) − 4

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  1. ilikephysics2
    • 3 years ago
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    distribute

  2. ilikephysics2
    • 3 years ago
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    -2x - 6 = -2x - 2 - 4 combine like terms

  3. Compassionate
    • 3 years ago
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    -2x -3 = -2x - 2 - 4 Transpose: -2x + 2x = 3 - 2 - 4 0 = 3 - 6 <-- Do the last part What happens when the x's cancel and become 0's?

  4. Hero
    • 3 years ago
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    sorry divide everything by -2 to get x + 3 = x + 1 + 2

  5. Hero
    • 3 years ago
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    Then you'll realize that x + 3 = x + 3

  6. Hero
    • 3 years ago
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    But you won't be able to solve for x

  7. Hero
    • 3 years ago
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    However, you can subtract x from both sides and subtract 3 from both sides to get 0 = 0 Then you'll know that the solutions are infinite.

  8. Hero
    • 3 years ago
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    actually, @Compassionate made a mistake with his solution while trying to distribute the -2 on the left side.

  9. Guez
    • 3 years ago
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    May you help me with this one? x = 0.8x + 72

  10. Hero
    • 3 years ago
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    subtract 0.8x from both sides to end up with 0.2x = 72 Divide both sides by 0.2 to get x = 72/0.2 x = 360

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