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anonymous

  • 5 years ago

2x+2y=22

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  1. anonymous
    • 5 years ago
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    What do you want with this?

  2. anonymous
    • 5 years ago
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    How do you solve that?

  3. anonymous
    • 5 years ago
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    Solve for what x? y?

  4. anonymous
    • 5 years ago
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    yes, sorry

  5. anonymous
    • 5 years ago
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    I am not sure you have everything here that is needed. If it says solve for x then you will have 2x + 2y = 22 2x = 22 - 2y x = 11 - y Are you sure this is what you want?

  6. anonymous
    • 5 years ago
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    it's a word problem... one kids buys 3 CD and 1DVD for $20, another kid buys 2CD's and 2DVDs for $22... how much are the CD's and DVDs

  7. anonymous
    • 5 years ago
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    the other equation is 3y+x=20

  8. anonymous
    • 5 years ago
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    Oh.. c = CD's d = DVD's 3c + d = 20 2c + 2d = 22 -6c - 2d = -40 Multiplied by -2 2c + 2d = 22 -4c = -18 added them up. c = 4.5 Substitute back in. 3c + d = 20 3(4.5) + d = 20 13.5 + d = 20 d = 6.5 CD's = $4.50 DVD's = $6.50

  9. anonymous
    • 5 years ago
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    Okay. Thanks so much!

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