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anonymous

  • one year ago

((a-1)/8) - (3(a-4)/10) = ((2a+4)/5) help please

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  1. anonymous
    • one year ago
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    solve for a

  2. anonymous
    • one year ago
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    \[\frac{ a-1 }{ 8 }-\frac{ 3(a-4) }{ 10 }=\frac{ 2a+4 }{ 5 }\] Your denominators are 8, 10 and 5. What's the smallest number that is divisible by all 3 (lcd)?

  3. anonymous
    • one year ago
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    80?

  4. anonymous
    • one year ago
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    80's not the smallest, but it will still work :) You need to multiply each of the fractions by 80 so the denominators will cancel when you reduce. \[\frac{ 80(a-1) }{ 8 }-\frac{ (80)(3)(a-4) }{ 10 }=\frac{ 80(2a+4) }{ 5 }\]

  5. anonymous
    • one year ago
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    i got 2.215

  6. anonymous
    • one year ago
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    as my final answer

  7. anonymous
    • one year ago
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    that's not what I got. Can you put up what you did?

  8. anonymous
    • one year ago
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    i got -65/23 is that right? @peachpi

  9. anonymous
    • one year ago
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    ??

  10. anonymous
    • one year ago
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    no. the 23 is right, so everything you did with the a is good. check your addition/subtraction with the constants

  11. anonymous
    • one year ago
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    11?

  12. anonymous
    • one year ago
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    yes

  13. anonymous
    • one year ago
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    11/23

  14. anonymous
    • one year ago
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    can u show me how you got that

  15. anonymous
    • one year ago
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spraguer (Moderator)
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