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anonymous

  • one year ago

Having problems with multi step equations, solving for x, or in this case b, with two sided equations. How to do this? 8 - 2 x b = -2/3 x (12 x b + 6)

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  1. texaschic101
    • one year ago
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    8 - 2b = -2/3(12b + 6) --- Is this your problem ??

  2. anonymous
    • one year ago
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    Yes

  3. texaschic101
    • one year ago
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    first we start on the right side and distribute the -2/3 through the parenthesis. Can you do that ?

  4. anonymous
    • one year ago
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    By distribute, you mean multiply?

  5. anonymous
    • one year ago
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    8 - 2b = -2/3(12b + 6 that's how it goes

  6. texaschic101
    • one year ago
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    yes...multiply everything in the parenthesis by -2/3

  7. anonymous
    • one year ago
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    How would you do this without using the variable?

  8. netlopes1
    • one year ago
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    \[8-2b=-\frac{2}{3}(12b+6) \rightarrow\]

  9. netlopes1
    • one year ago
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    is this?

  10. anonymous
    • one year ago
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    I mean leaving it out, it would be -12.

  11. anonymous
    • one year ago
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    Yes @netlopes1

  12. texaschic101
    • one year ago
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    8 - 2b = (-2/3) * 12b + (-2/3) * 6 8 - 2b = -24/3b - 12/3 ---- reduce when you can 8 - 2b = -8b - 4 are you still following this ??

  13. anonymous
    • one year ago
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    Not completely, you replaced b with -2/3 :P

  14. netlopes1
    • one year ago
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    \[8-2b=-\frac{2}{3}.12b - \frac{2}{3}.6 \rightarrow\]

  15. texaschic101
    • one year ago
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    where you see that ?? I did not replace b with -2/3

  16. netlopes1
    • one year ago
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    This is a distributive rule, ok?

  17. anonymous
    • one year ago
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    Ohh, you left b but added -2/3.

  18. netlopes1
    • one year ago
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    \[8-2b=-\frac{24b}{3}-\frac{12}{3}\rightarrow do\quad you\quad understand\quad?\]

  19. texaschic101
    • one year ago
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    to get rid of the parenthesis we use the distributive property...that means you take the number right before the parenthesis and multiply it by everything in the parenthesis. 8 - 2b = -2/3 (12b + 6) = 8 - 2b = (-2/3 * 12b) + (-2/3 * 6) = 8 - 2b = (-24/3)b + (-12/3) = 8 - 2b = -8b - 4 any better understand this ??

  20. netlopes1
    • one year ago
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    ok, texaschic101

  21. netlopes1
    • one year ago
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    \[finally,\quad 8-2b=-8b-4\rightarrow6b=-12\rightarrow b=-2\]

  22. texaschic101
    • one year ago
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    you understand ?

  23. netlopes1
    • one year ago
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    \[6-3b=-\frac{3}{2}(-4b+4) \rightarrow\]

  24. netlopes1
    • one year ago
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    If you understand, answer this equation, ok? It's the same "model", I mean.

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