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Republican31

  • one year ago

Solve 3 – 2(b – 5) = 7. Or is the equation an Identity? Or if it has any solution at all? I want help to solve it more than the straight answer.

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  1. anonymous
    • one year ago
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    so you just want to solve for b right?

  2. Republican31
    • one year ago
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    Yes. If it is solvable.

  3. anonymous
    • one year ago
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    okay so you can start of by distributing the -2 into (b - 5) do you know how to do that?

  4. rhr12
    • one year ago
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    b=12

  5. Republican31
    • one year ago
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    Yes. 3-2b+10=7, right?

  6. anonymous
    • one year ago
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    yes okay so now you can combine the 3 and the 10 into a 13

  7. anonymous
    • one year ago
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    also b does not =12 @rhr12

  8. anonymous
    • one year ago
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    okay so now you should have -2b + 13 = 7

  9. Republican31
    • one year ago
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    Okay so 13-2b=7. Then subtract 13 from both sides?

  10. rhr12
    • one year ago
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    (3-2)*{b(12)-5}=7 1*7=7 7=7

  11. rhr12
    • one year ago
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    i used a different formula but i also like your formula @watchpencilpaper

  12. Republican31
    • one year ago
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    -2b = -6. So then divide -6 by -2, making b=3, correct?

  13. Republican31
    • one year ago
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    @rhr12 that would make it an identity, correct? If it is correct, @watchpencilpaper?

  14. Republican31
    • one year ago
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    If the equation is correct, I mean.

  15. anonymous
    • one year ago
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    you cant subtract the 2 from the 3 before multiplying it by the (12-5) so its wrong

  16. anonymous
    • one year ago
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    lets just continue solving the equation and then we can check our answer so we left of at -2b = -6 right?

  17. Republican31
    • one year ago
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    Yes. b=3?

  18. anonymous
    • one year ago
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    yes okay and we can check that by plugging it back into our equation \[3 - 2(b-5) = 7\] \[3 - 2((3)-5) = 7\] \[3 - 2(-2) = 7\] \[3 - (-4) = 7\] \[3 + 4 = 7\] \[7 = 7\]

  19. Republican31
    • one year ago
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    Alright! Thank you!

  20. anonymous
    • one year ago
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    yep no problem :D

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