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overtonka

  • one year ago

Solve each system of equations by substitution -3v+3x=12 3v-6x=-21

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  1. tkhunny
    • one year ago
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    1) Divide EVERYTHING by 3.

  2. skullpatrol
    • one year ago
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    $$-3v+3x=12$$ $$3v-6x=-21$$ $$\frac{1}{3}(-3v+3x)=\frac{1}{3}(12)$$ $$ \frac{1}{3} (3v-6x)=\frac{1}{3}(-21)$$

  3. skullpatrol
    • one year ago
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    Dividing by 3 is the same as multiplying by 1/3 right? @overtonka

  4. overtonka
    • one year ago
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    I really don't know how to do this o.o

  5. skullpatrol
    • one year ago
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    The multiplication property of equality allows you to multiply both sides of an equation by the same nonzero number and get an equivalent equation. Have you heard of this property in class?

  6. skullpatrol
    • one year ago
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    @overtonka

  7. overtonka
    • one year ago
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    No I havent

  8. skullpatrol
    • one year ago
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    Let me give you an example let's say 3=3, now I multiply both sides by 2 what would I get?

  9. skullpatrol
    • one year ago
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    @overtonka

  10. abc123!
    • one year ago
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    do u want the answer or how to get the answer

  11. ryan123345
    • one year ago
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    To atleast make the question easier divide everything by 3

  12. overtonka
    • one year ago
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    I tried that

  13. ryan123345
    • one year ago
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    |dw:1361972385891:dw|

  14. skullpatrol
    • one year ago
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    @overtonka Does giving you the answer help you learn?

  15. skullpatrol
    • one year ago
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    Do you want to learn how to do this?

  16. ryan123345
    • one year ago
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    |dw:1361972609881:dw|

  17. ryan123345
    • one year ago
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    |dw:1361972653183:dw|

  18. skullpatrol
    • one year ago
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    You must first understand why you do the steps @overtonka

  19. ryan123345
    • one year ago
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    |dw:1361972684025:dw|

  20. skullpatrol
    • one year ago
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    ryan will give you the answer .. I can show you how to do it ...you choose

  21. ryan123345
    • one year ago
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    |dw:1361972804662:dw|

  22. skullpatrol
    • one year ago
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    Being interested in how and why things work is what math is all about

  23. skullpatrol
    • one year ago
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    Do you want to learn how to do this?

  24. skullpatrol
    • one year ago
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    Why the steps work?

  25. GaLm
    • one year ago
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    Ryan is showing how to do it, he's not just giving answers

  26. ryan123345
    • one year ago
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    Thank you.

  27. skullpatrol
    • one year ago
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    Let the learner decide.

  28. GaLm
    • one year ago
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    ok, @overtonka , do you like the way skullpatrol does it or the way Ryan answers

  29. Callisto
    • one year ago
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    "It is better to guide the user to an answer rather than doing all the work yourself. We discourage giving out answers without letting the asker at least take some part in the analysis - the aim of this site is to teach. Please refer to our code of conduct at http://openstudy.com/code-of-conduct for more information. Thank you."

  30. ryan123345
    • one year ago
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    Okay sorry dude

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