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anonymous

  • one year ago

how do i do an equation like this [2x-3]<7 ?

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  1. anonymous
    • one year ago
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    You solve it like you would a normal equation, the only difference is when you try to divide to get x by itself. If you divide by a negative number you flip the "<" to a ">"

  2. anonymous
    • one year ago
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    ok can you be more specific?

  3. anonymous
    • one year ago
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    \[2x-3<7\] \[2x<10\] \[x = \frac{ 10 }{ 2 }\] \[x = 5\]

  4. anonymous
    • one year ago
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    Those last 2 "=" should be "<", sorry

  5. anonymous
    • one year ago
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    To what I said earlier, if it was: -2x < 10 In order to solve for x you would have to divide by 'negative' 2. Since you divide by a negative you just flip the sign to a >

  6. anonymous
    • one year ago
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    Make sense?

  7. anonymous
    • one year ago
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    yeah i think im getting it

  8. anonymous
    • one year ago
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    Good. Only way to get good at math is practice

  9. Hero
    • one year ago
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    I think you meant this: |2x-3|< 7

  10. Hero
    • one year ago
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    @Dragonjuice97

  11. anonymous
    • one year ago
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    yeah

  12. anonymous
    • one year ago
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    Oh it's an absolute value? Ok it's going to be a little different

  13. anonymous
    • one year ago
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    Ok, first you have to get the absolute value by it self, in this chance it already is. Now, you need to have 2 equations. One is set equal to 7, and the other equal to -7 so, \[2x-3 < -7\] and \[2x-3<7\]

  14. anonymous
    • one year ago
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    Then you just solve both of them like I did earlier. You'll get 2 values, one from each equation. Make sense?

  15. anonymous
    • one year ago
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    yeah

  16. anonymous
    • one year ago
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    First you add 3 to both sides so that you get : 2x = 10. Now divide both sides by 2 and what do you get?

  17. anonymous
    • one year ago
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    What answers did you get?

  18. anonymous
    • one year ago
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    The answer is 5.

  19. anonymous
    • one year ago
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    There's 2 answers

  20. anonymous
    • one year ago
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    oh

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